#fca31d as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.02:1	fail	fail	fail	AA: use #a66403 as the text (4.72:1) AAA: use #7e4c02 as the text (7.19:1) AA: or shift the background to #474747 (4.6:1) AAA: or shift the background to #2b2b2b (7.01:1)
Aaon black	10.4:1	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 #fca31d as the background.

Brands using this color

Palettes built around it

a1a1aa 71717a f59e0b 18181b f4f4f5

Graphite

Open in tool →

A greyscale system with a single amber — the accent does all the work, so allow one per screen.

Technical Muted Dark Modern

10b981 134e4a f59e0b ffffff 10231b

Mint Modern

Open in tool →

Emerald as a primary rather than a success color, anchored by deep teal text — fresh, friendly, and fintech-adjacent.

Modern Clean FriendlyFintech

1d4ed8 64748b f59e0b ffffff 1e293b

Campus

Open in tool →

Institutional blue with a highlighter-amber accent — trustworthy for parents, lively enough for students.

Friendly Cool CleanEducation

Fonts for this mood

#fca31d 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 #fca31d

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 #fca31d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fca31d-c4b99c-62bfcb-2d2d1f-f1eae9?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