diff --git a/examples/colorMaps.py b/examples/colorMaps.py
index df8559a8..16c573c2 100644
--- a/examples/colorMaps.py
+++ b/examples/colorMaps.py
@@ -1,8 +1,7 @@
 # -*- coding: utf-8 -*-
 """
-This example demonstrates generating ColorMap objects from external data.
-It displays the full list of color maps available as local files or by import 
-from Matplotlib or ColorCET.
+This example displays all color maps currently available, either as local data
+or imported from Matplotlib of ColorCET.
 """
 ## Add path to library (just for examples; you do not need this)
 import initExample
@@ -49,19 +48,22 @@ def add_bar(lw, name, cm):
 
 add_heading(lw, 'local color maps')
 list_of_maps = pg.colormap.listMaps()
+list_of_maps = sorted( list_of_maps, key=lambda x: x.swapcase() )
 for map_name in list_of_maps:
     cm = pg.colormap.get(map_name)
     add_bar(lw, map_name, cm)
 
 add_heading(lw, 'Matplotlib import')
 list_of_maps = pg.colormap.listMaps('matplotlib')
+list_of_maps = sorted( list_of_maps, key=lambda x: x.lower() )
 for map_name in list_of_maps:
     cm = pg.colormap.get(map_name, source='matplotlib', skipCache=True)
     if cm is not None:
         add_bar(lw, map_name, cm)
 
 add_heading(lw, 'ColorCET import')
-list_of_maps = pg.colormap.listMaps('colorcet')   
+list_of_maps = pg.colormap.listMaps('colorcet')
+list_of_maps = sorted( list_of_maps, key=lambda x: x.lower() )
 for map_name in list_of_maps:
     cm = pg.colormap.get(map_name, source='colorcet', skipCache=True)
     if cm is not None:
diff --git a/pyqtgraph/colormap.py b/pyqtgraph/colormap.py
index 2a153954..c59310df 100644
--- a/pyqtgraph/colormap.py
+++ b/pyqtgraph/colormap.py
@@ -151,7 +151,7 @@ def getFromMatplotlib(name):
     col_map = mpl_plt.get_cmap(name)
     if hasattr(col_map, '_segmentdata'): # handle LinearSegmentedColormap
         data = col_map._segmentdata
-        if ('red' in data) and isinstance(data['red'], Sequence):
+        if ('red' in data) and isinstance(data['red'], (Sequence, np.ndarray)):
             positions = set() # super-set of handle positions in individual channels
             for key in ['red','green','blue']:
                 for tup in data[key]:
diff --git a/pyqtgraph/colors/maps/CC0 legal code - applies to virids, magma, plasma, inferno and cividis.txt b/pyqtgraph/colors/maps/CC0 legal code - applies to virids, magma, plasma, inferno and cividis.txt
new file mode 100644
index 00000000..0e259d42
--- /dev/null
+++ b/pyqtgraph/colors/maps/CC0 legal code - applies to virids, magma, plasma, inferno and cividis.txt	
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
+    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
+    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator
+and subsequent owner(s) (each and all, an "owner") of an original work of
+authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for
+the purpose of contributing to a commons of creative, cultural and
+scientific works ("Commons") that the public can reliably and without fear
+of later claims of infringement build upon, modify, incorporate in other
+works, reuse and redistribute as freely as possible in any form whatsoever
+and for any purposes, including without limitation commercial purposes.
+These owners may contribute to the Commons to promote the ideal of a free
+culture and the further production of creative, cultural and scientific
+works, or to gain reputation or greater distribution for their Work in
+part through the use and efforts of others.
+
+For these and/or other purposes and motivations, and without any
+expectation of additional consideration or compensation, the person
+associating CC0 with a Work (the "Affirmer"), to the extent that he or she
+is an owner of Copyright and Related Rights in the Work, voluntarily
+elects to apply CC0 to the Work and publicly distribute the Work under its
+terms, with knowledge of his or her Copyright and Related Rights in the
+Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not
+limited to, the following:
+
+  i. the right to reproduce, adapt, distribute, perform, display,
+     communicate, and translate a Work;
+ ii. moral rights retained by the original author(s) and/or performer(s);
+iii. publicity and privacy rights pertaining to a person's image or
+     likeness depicted in a Work;
+ iv. rights protecting against unfair competition in regards to a Work,
+     subject to the limitations in paragraph 4(a), below;
+  v. rights protecting the extraction, dissemination, use and reuse of data
+     in a Work;
+ vi. database rights (such as those arising under Directive 96/9/EC of the
+     European Parliament and of the Council of 11 March 1996 on the legal
+     protection of databases, and under any national implementation
+     thereof, including any amended or successor version of such
+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
+     implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
+irrevocably and unconditionally waives, abandons, and surrenders all of
+Affirmer's Copyright and Related Rights and associated claims and causes
+of action, whether now known or unknown (including existing as well as
+future claims and causes of action), in the Work (i) in all territories
+worldwide, (ii) for the maximum duration provided by applicable law or
+treaty (including future time extensions), (iii) in any current or future
+medium and for any number of copies, and (iv) for any purpose whatsoever,
+including without limitation commercial, advertising or promotional
+purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
+member of the public at large and to the detriment of Affirmer's heirs and
+successors, fully intending that such Waiver shall not be subject to
+revocation, rescission, cancellation, termination, or any other legal or
+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
+Waiver shall be preserved to the maximum extent permitted taking into
+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
+person a royalty-free, non transferable, non sublicensable, non exclusive,
+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
+maximum duration provided by applicable law or treaty (including future
+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
+Rights in the Work or (ii) assert any associated claims and causes of
+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
+    surrendered, licensed or otherwise affected by this document.
+ b. Affirmer offers the Work as-is and makes no representations or
+    warranties of any kind concerning the Work, express, implied,
+    statutory or otherwise, including without limitation warranties of
+    title, merchantability, fitness for a particular purpose, non
+    infringement, or the absence of latent or other defects, accuracy, or
+    the present or absence of errors, whether or not discoverable, all to
+    the greatest extent permissible under applicable law.
+ c. Affirmer disclaims responsibility for clearing rights of other persons
+    that may apply to the Work or any use thereof, including without
+    limitation any person's Copyright and Related Rights in the Work.
+    Further, Affirmer disclaims responsibility for obtaining any necessary
+    consents, permissions or other rights required for any use of the
+    Work.
+ d. Affirmer understands and acknowledges that Creative Commons is not a
+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.
diff --git a/pyqtgraph/colors/maps/cividis.csv b/pyqtgraph/colors/maps/cividis.csv
new file mode 100644
index 00000000..34101b64
--- /dev/null
+++ b/pyqtgraph/colors/maps/cividis.csv
@@ -0,0 +1,266 @@
+; cividis colormap, optimized with consideration for color vision deficiency
+; to enable accurate interpretation of scientific data
+;
+; Published by Jamie R. Nuñez, Christopher R. Anderton and Ryan S. Renslow
+; in PLoS ONE 13(7): e0199239. https://doi.org/10.1371/journal.pone.0199239
+; available under Creative Commons CC0 public domain dedication.
+;
+; You should have received a copy of the CC0 legalcode along with this
+; work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+;
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diff --git a/pyqtgraph/colors/maps/inferno.csv b/pyqtgraph/colors/maps/inferno.csv
new file mode 100644
index 00000000..5b123d08
--- /dev/null
+++ b/pyqtgraph/colors/maps/inferno.csv
@@ -0,0 +1,270 @@
+; New matplotlib colormaps by Nathaniel J. Smith, Stefan van der Walt,
+; and (in the case of viridis) Eric Firing.
+;
+; This file and the colormaps in it are released under the CC0 license /
+; public domain dedication. The creators would appreciate credit if you use or
+; redistribute these colormaps, but do not impose any legal restrictions.
+;
+; To the extent possible under law, the persons who associated CC0 with
+; mpl-colormaps have waived all copyright and related or neighboring rights
+; to mpl-colormaps.
+;
+; You should have received a copy of the CC0 legalcode along with this
+; work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+;
+0.001462,0.000466,0.013866
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diff --git a/pyqtgraph/colors/maps/magma.csv b/pyqtgraph/colors/maps/magma.csv
new file mode 100644
index 00000000..d8185ed2
--- /dev/null
+++ b/pyqtgraph/colors/maps/magma.csv
@@ -0,0 +1,270 @@
+; New matplotlib colormaps by Nathaniel J. Smith, Stefan van der Walt,
+; and (in the case of viridis) Eric Firing.
+;
+; This file and the colormaps in it are released under the CC0 license /
+; public domain dedication. The creators would appreciate credit if you use or
+; redistribute these colormaps, but do not impose any legal restrictions.
+;
+; To the extent possible under law, the persons who associated CC0 with
+; mpl-colormaps have waived all copyright and related or neighboring rights
+; to mpl-colormaps.
+;
+; You should have received a copy of the CC0 legalcode along with this
+; work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+;
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diff --git a/pyqtgraph/colors/maps/plasma.csv b/pyqtgraph/colors/maps/plasma.csv
new file mode 100644
index 00000000..c6c40d2d
--- /dev/null
+++ b/pyqtgraph/colors/maps/plasma.csv
@@ -0,0 +1,270 @@
+; New matplotlib colormaps by Nathaniel J. Smith, Stefan van der Walt,
+; and (in the case of viridis) Eric Firing.
+;
+; This file and the colormaps in it are released under the CC0 license /
+; public domain dedication. The creators would appreciate credit if you use or
+; redistribute these colormaps, but do not impose any legal restrictions.
+;
+; To the extent possible under law, the persons who associated CC0 with
+; mpl-colormaps have waived all copyright and related or neighboring rights
+; to mpl-colormaps.
+;
+; You should have received a copy of the CC0 legalcode along with this
+; work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+;
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diff --git a/pyqtgraph/colors/maps/viridis.csv b/pyqtgraph/colors/maps/viridis.csv
new file mode 100644
index 00000000..5f2b5fb5
--- /dev/null
+++ b/pyqtgraph/colors/maps/viridis.csv
@@ -0,0 +1,270 @@
+; New matplotlib colormaps by Nathaniel J. Smith, Stefan van der Walt,
+; and (in the case of viridis) Eric Firing.
+;
+; This file and the colormaps in it are released under the CC0 license /
+; public domain dedication. The creators would appreciate credit if you use or
+; redistribute these colormaps, but do not impose any legal restrictions.
+;
+; To the extent possible under law, the persons who associated CC0 with
+; mpl-colormaps have waived all copyright and related or neighboring rights
+; to mpl-colormaps.
+;
+; You should have received a copy of the CC0 legalcode along with this
+; work.  If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+;
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