Submit portable freeware that you find here. It helps if you include information like description, extraction instruction, Unicode support, whether it writes to the registry, and so on.
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.
Features:
WCAG 2.1 compliance indicators
Several ways to set colours: raw text entry (accepts any valid CSS colour format), RGB sliders, colour picker (Windows and macOS only)
Support for alpha transparency on foreground colours
Colour blindness simulator
I know this seems like an incredibly niche tool for an extremely small audience, but I've lost count of the number of conversations I've had about light text on a light background and visa versa. It's not even about having poor vision or accessiblity. Having something that can directly declare "this is the wrong color combination" and lists a standard is huge.
