#ff5f57 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.99:1	fail	fail	fail	AA: use #eb0c00 as the text (4.58:1) AAA: use #b30900 as the text (7.1:1) AA: or shift the background to #2e2e2e (4.54:1) AAA: or shift the background to #000000 (7.03:1)
Aaon black	7.03:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff5f57 as the background.

Brands using this color

Palettes built around it

ff5e5b 00cecb ffed66 ffffff 222222

Crayon Box

Open in tool →

Red, teal and yellow at crayon saturation — joyful, but on white with black type so it stays readable for grown-ups.

Playful Vivid FriendlyKids

Fonts for this mood

#ff5f57 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

Warm fonts →Playful fonts →Bold fonts →

mcpConnect your agent — build around #ff5f57

live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp

claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp

try this prompt

›analyze #ff5f57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff5f57-c4a39c-62cb9d-2d261f-f1e9ed?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md