4096 Color Wheel Version 2.1
Weblogs Work
Buttonator
drag and drop icon/button maker
Telegraphics - Free Plugins for Photoshop
Free Photoshop and Illustrator plugins, and other software, including GPL source code
Gravatar - Globally Recognized Avatar
Favicon Generator
… for perfect icons on all browsers
2022 Design Tools Survey
Contrast
A macOS app for quick access to WCAG color contrast ratios → https://itunes.apple.com/de/app/contrast-color-accessibility/id1254981365?l=en&mt=12
Color.review
Colors that look and work great for everyone
Colour Contrast Analyser (CCA)
The Colour Contrast Analyser (CCA) helps you determine the legibility of text and the contrast of visual elements, such as graphical controls and visual indicators.
Colour Contrast Check
For people with impaired vision, we are required to ensure that there is a minimum amount of contrast between our foreground and background colors. formulas for determining optimum color contrast. W3C's specification on color contrast... hp color palette. style sheet text colors. style sheet text colors.
How Accessible is Your Website?
8 Tools to Analyze Your Website’s Level of Accessibility