Add link to color names and colorspace note

.gitignore

@@ -2,6 +2,7 @@ NOTES.md
 *.png
 *.gif
 didder
+didder-*
 !david_dithered.png
 
 

README.md

@@ -32,7 +32,8 @@ It is backed by my [dithering library](https://github.com/makeworld-the-better-o
 More methods of dithering are being worked on, such as Riemersma, Yuliluoma, and blue noise. If you'd like to help out with development of those methods, or request a new one, please make an issue in my [dither](https://github.com/makeworld-the-better-one/dither) library repo, not this one.
 
 ## Features
-- Set palette using hex codes, number 0-255 (grayscale), or SVG color names
+- Set palette using hex codes, number 0-255 (grayscale), or [SVG color names](https://www.w3.org/TR/SVG11/types.html#ColorKeywords)
+  - All colors are interpreted in the sRGB colorspace
 - Optionally recolor image with a different palette after dithering
 - Set dithering strength
 - Image is automatically converted to grayscale if palette is grayscale

main.go

@@ -34,7 +34,9 @@ Colors (for --palette and --recolor) are entered as a single quoted argument.
 They can be separated by spaces and commas. Colors can be formatted as hex
 codes (case-insensitive, with or without the '#'), a single number from 0-255
 for grayscale, or a color name from the SVG 1.1 spec (aka the HTML or W3C
-color names).
+color names). All colors are interpreted in the sRGB colorspace.
+
+Color names: https://www.w3.org/TR/SVG11/types.html#ColorKeywords
 
 Images are converted to grayscale automatically if the palette is grayscale.
 This produces more correct results.