Colora
5.9#18 in color palette generatorsFree planFree planWindows
Visit
Colora suits Windows users who need to pick screen colors, convert among common color formats, and save palettes. It may also suit people who use GIMP or want a simple color history.
It suits designers and other color-focused creatives who want to develop palettes from a concept and carry them into design work. The Basic tier may suit users who can work within a 10-palette limit.