#fec91b as text	Ratio	AA	AA large	AAA	Fix
Aaon white	1.55:1	fail	fail	fail	AA: use #937101 as the text (4.56:1) AAA: use #6b5201 as the text (7.41:1) AA: or shift the background to #595959 (4.53:1) AAA: or shift the background to #3d3d3d (7.03:1)
Aaon black	13.58:1	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 #fec91b as the background.

Brands using this color

Palettes built around it

e11d48 111111 facc15 ffffff

Tabloid

Open in tool →

Red, black and yellow on white is the loudest three-color system in print — use it when headlines are the product.

Editorial Bold Vivid

Fonts for this mood

#fec91b 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 #fec91b

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 #fec91b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fec91b-c4bf9c-62adcb-2a2d1f-f1ece9?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