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Sessions College Color Calculator vs Paletton: catalog facts
Sessions College Color Calculator	Paletton
Free Free to use on the Sessions College website.	Free No paid tier; the site states advertising is its only profit and asks for donations.
Web	Web
Builds palettes from classic color harmonies Gives hex, RGB and CMYK values for each color	Color models from monochromatic to triad and tetrad, with or without complement, plus a free-style mode Vision simulation filter for several forms of color blindness, gamma, desaturation and grayscale
Sits inside a college marketing site with course promotion around it Covers harmonies only, without contrast or accessibility checks	Requires JavaScript in the browser; no installable app Ad-supported; the site asks visitors not to use ad blockers
Web application	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.