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'.
Color
#fbc737
#fbc737
hex
#fbc737rgb
rgb(251, 199, 55)hsl
hsl(44, 96%, 60%)oklch
oklch(0.853 0.16 87.4)Closest name: Amber (#ffbf00)Relative luminance 0.6163
Colors that go with #fbc737
Charcoal, Cornflower Blue and Deep Sky Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Cornflower Blue #6495ed
complementaryshippedCornflower Blue sits directly opposite #fbc737 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Deep Sky Blue #00bfff
split-complementshippedDeep Sky Blue is a split-complement of #fbc737: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #fbc737 in 5 real palettes, including Tabloid and Diner, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #fbc737: 8 real palettes, including Walmart's brand system and Warner Bros.'s brand system, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #fbc737 in 4 real palettes, including Heatwave and Brex's brand system, as the lead colour.
Sage Green #9caf88
shippedDesigners have shipped Sage Green with #fbc737: 4 real palettes, including Polaroid and Chalkboard, as the supporting colour.
Slate Gray #708090
shipped5 real palettes, including Noir Beauty and Campus put Slate Gray beside #fbc737, as the supporting colour.
Real palettes that use #fbc737
Tints & shades
Harmonies
Contrast
| #fbc737 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.58:1 | fail | fail | fail | |
Aaon black | 13.33:1 | 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 #fbc737 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#fbc737 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #fbc737
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #fbc737 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/fbc737-c4be9c-62b1cb-2b2d1f-f1ebe9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md