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

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