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
#ffbb00
#ffbb00
hex
#ffbb00rgb
rgb(255, 187, 0)hsl
hsl(44, 100%, 50%)oklch
oklch(0.833 0.172 82.1)Closest name: Amber (#ffbf00)Relative luminance 0.568
Colors that go with #ffbb00
Charcoal, Deep Sky Blue and Cornflower 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.
Deep Sky Blue #00bfff
complementaryshippedDeep Sky Blue sits directly opposite #ffbb00 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #ffbb00 in 6 real palettes, including Mastodon hosted on mastodon.social's brand system and Blueprint, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #ffbb00 in 5 real palettes, including Tabloid and Diner, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Dark Olive Green #556b2f
shippedDark Olive Green is paired with #ffbb00 in 4 real palettes, including Farmers Market and Miro's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #ffbb00 in 8 real palettes, including Warner Bros.'s brand system and Walmart's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #ffbb00 in 5 real palettes, including Heatwave and PostHog's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #ffbb00 in 4 real palettes, including Open House and FIFA's brand system, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #ffbb00
Tints & shades
Harmonies
Contrast
| #ffbb00 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.7:1 | fail | fail | fail | |
Aaon black | 12.36:1 | 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 #ffbb00 as the background.
Brands using this color
Palettes built around it
Trailhead
Open in tool →Rust, pine and sun — high-visibility earth tones that read at a distance and on a trail sign.
Heatwave
Open in tool →Blaze orange and hot yellow with one cold blue — the high-noon palette; use the blue where the eye needs to rest.
Fonts for this mood
#ffbb00 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ffbb00
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 #ffbb00 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ffbb00-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