Partial commit

Author: lukelbd

docs/api.rst

@@ -14,6 +14,13 @@ is deprecated (see :ref:`What's New <whats_new>`). However, proplot adheres to
 deprecated functionality will still work and issue warnings rather than errors
 until the first major release (version 1.0.0).
 
+.. important::
+
+   The color transformation functions like `to_rgba` and `scale_luminance` from
+   proplot < 0.10.0 can now be found as methods on the new `~proplot.colors.Color`
+   class. Note that old code that uses commands like ``pplt.to_rgba()`` and
+   ``pplt.scale_luminance()`` will still work (but result in a deprecation warning).
+
 .. important::
 
    The documentation for "wrapper" functions like `standardize_1d` and `cmap_changer`
@@ -132,4 +139,4 @@ Miscellaneous functions
 
 .. automodsumm:: proplot.utils
    :toctree: api
-   :skip: shade, saturate
+   :skip: shade, saturate get_colors, set_hue, set_saturation, set_luminance, set_alpha, shift_hue, scale_saturation, scale_luminance, to_hex, to_rgb, to_xyz, to_rgba, to_xyza