Resource
Monochromatic Color Generator (Hello Keyboard)
Hello Keyboard's Monochromatic Color Generator is a free tool that needs no account. Enter a HEX or RGB colour and it generates a scale of 3 to 13 lighter and darker shades. It shows contrast guidance against white and black, and lets you copy the palette as CSS variables or download it.
It works well as an early palette exercise. Keep in mind that the generated shades are not guaranteed to be accessible, and the tool is not a full accessibility audit. Once you've chosen your colours, check each foreground and background pair in its real text and interface context against WCAG contrast requirements.
This tool was suggested by its developer and is shared here as a helpful resource. Its inclusion isn't an RGD endorsement.
