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Atmos vs Sessions College Color Calculator: catalog facts
Atmos	Sessions College Color Calculator
Freemium Free to start; an account login is offered for further use.	Free Free to use on the Sessions College website.
Web	Web
Uniform shade and scale generation Semantic status colors from a primary color	Builds palettes from classic color harmonies Gives hex, RGB and CMYK values for each color
Browser only Some features may need an account	Sits inside a college marketing site with course promotion around it Covers harmonies only, without contrast or accessibility checks
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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