Handprint,com section on color theory is one of the most extensive presentations of technical information about color theory on the web
A color game that you can play and pretend you are doing homework for this class: http://i-love-hue.com/
(Actually, besides being a very chill game, it is probably also valuable as a skill-builder in perceiving and predicting the way that colors appear to change based on context.)
Color Code: an information visualization of the "color" of words in the english language based on image search: http://www.bewitched.com/live/colorcode/index.html
Watching ink being made - for the sheer dumb beauty of the colors: https://digg.com/video/how-ink-is-made
A fast-paced roundup of great color use in film, from Cinefix: https://www.youtube.com/watch?v=tILIeNjbH1E
A short video about developing a color script: https://www.youtube.com/watch?time_continue=42&v=9liKyUnfNO0&feature=emb_title
Letter of Reccomendation: Color Blind Pal: A lovely short Essay by Zoe Dubno about color blindness
Datawrapper: A good concise discussion of how to make smart color choices in data visualization
Seeing Color with Zhiwan Cheung - an interview podcast with artists of color, hosted by a CMU grad
Werner’s Nomenclature of Colours - A recreation of the original 1821 color guidebook.
An interesting example of how information can be extrapolated from color. Article In New York Times: The True Colors of America are Grey and Green
Other Web Resources:
Adobe Color - Generate color schemes, extract colors or gradients from images
Colrd - generate palettes and gradients
Color Explorer - Generate palettes from images, websites, etc. analyze and match colors
coolors - Generate color schemes.
Paletton - Color palette generator
ColoRotate - palette generator and color extraction within a 3-D visualization of color space
scale - Color scale generator.
Tin Eye - extract colors from an image
Colorslike.me - extract colors from an image
Colorhunter - extract colors from an image
DeGraeve - extract colors from an image
Image to Color Palette Generator - allows you to generate a color palette based upon an input image.
Pigment - Like a color moodboard.
0to255 - For lightening / darkening colors.
Colourco.de - Pick colours based on hsl.
Gradient Image Generator - Creates CSS3 Codes and PNG Images
Contrast Checker - Make sure your foreground/background colors are accessible.
Calcolor - Calculate colors. Share palettes.
Multicolr - Search images by color.
Image Color Summarizer - RGB, HSV, LCH & Lab image color statistics and clustering
Coolhue - Nice gradients.
ColorZilla - Advanced color tools, including an extension.
WebGradients - A free collection of 180 linear gradients.
Color Scales - Find tints, tones and shades of a color based on human perception.
Colorable - Color palette combination contrast tester, for node.js
Pixel Chart - distributes pixels from any image
Professor Merrell's website: http://www.contrib.andrew.cmu.edu/~cmerrell/