#fdc63a as text	Ratio	AA	AA large	AAA	Fix
Aaon white	1.58:1	fail	fail	fail	AA: use #976d02 as the text (4.66:1) AAA: use #6f5001 as the text (7.44:1) AA: or shift the background to #575757 (4.58:1) AAA: or shift the background to #3b3b3b (7.1:1)
Aaon black	13.32:1	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 #fdc63a as the background.

Brands using this color

Lemon Squeezyprimary · #fcc434 · Δ0.552

Palettes built around it

38bdf8 818cf8 fbbf24 0f172a e2e8f0

Blueprint

Open in tool →

Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.

Technical Cool Modern Dark

c2410c 365314 fbbf24 f4efe6 1f1a12

Trailhead

Open in tool →

Rust, pine and sun — high-visibility earth tones that read at a distance and on a trail sign.

Warm Bold VividOutdoors

Fonts for this mood

#fdc63a 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 #fdc63a

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 #fdc63a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fdc63a-c4bd9c-62b2cb-2b2d1f-f1ebe9?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