Adobe Color
Color is a service of Adobe Creative Cloud that generates themes for use in Adobe desktop apps such as Photoshop and Illustrator, and Adobe mobile apps such as Illustrator Draw and Photoshop Sketch.
Canva Color Wheel
A web tool for selecting colors that also has a basic description of color theory and color models.
Color Brewer
A web tool for selecting colors. It allows you to filter by number of data series, data type, and other attributes. Palettes are provided from a finite source of palettes.
Color Contrast Checker
Color Contrast Checker is a free tool that you can use to test the contrast on your foreground and background colors. Developed by Mari Johannessen, you simply type in your color HEX codes and it gives you a color contrast ‘score’.
ColorCop
Color Cop is a free, multi-purpose color picker for Windows for use by web designers and programmers. It identifies and represents colors in various hex color code formats.
ColorDot
Color Cop is a free, multi-purpose color picker for Windows for use by web designers and programmers. It identifies and represents colors in various hex color code formats.
Color Hunt
Color Hunt is a social platform for sharing color palettes. They pick and collect curated color combinations which are defined by digital HEX codes.
Color Oracle
Color Oracle is a free color blindness simulator for Windows, Macs, and Linux that takes the guesswork out of designing for color blindness by showing you in real time what people with common color vision impairments will see.
ColRD
ColRD provides tools to inspire your search for the perfect color.
Coolors
Create, save, and share color palettes, or use their library to choose another palette.
Design Seeds
Shares design inspiration through nature-inspired color palettes.
Found Palettes
An app that allows you to create a color palette from a photo by simply tapping on colors in the photo to add color swatches along the bottom.
Hero Patterns
A collection of repeatable SVG background patterns for you to use on your web projects. You can also download and move into your favorite editing program to use in your other projects such as slide decks or infographics.
Image Color Picker
Choose colors from the basic color chooser or upload a picture (or point to a URL) to get colors in HEX, RGB and HSL format.
Paletton
Growing source of information about color theory, color perception, color vision, and color combinations. You can create custom color palettes and check against an example, as well as use their color vision deficiency tool to check for consistency with color blindness.
Picular
Google, but for colors. Enter a search term and a series of color swatches pops up.
Pigment by Shape Factory
Wide range of color selections that you can pair together and obtain shades, tints, and other combinations.
Sim Daltonism
App available through the iTunes store, this tool lets you visualize colors as they are perceived with various types of color blindness. Move the Sim Daltonism window over something on the screen and see what it looks like with a color blindness.
uiGradients
Beautiful color gradients for designers and developers.
Viz Palette
Born out of a frustration with picking colors for data visualizations. This project is optimized for tweaking, copying, and pasting in and out of JavaScript. Made by Susie Lu & Elijah Meeks.
Wes Anderson Palettes
Yes, a series of color palettes based on stills from Wes Anderson films.