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
#ffb805
#ffb805
hex
#ffb805rgb
rgb(255, 184, 5)hsl
hsl(43, 100%, 51%)oklch
oklch(0.827 0.17 80.4)Closest name: Amber (#ffbf00)Relative luminance 0.5555
Colors that go with #ffb805
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 #ffb805 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
shippedDesigners have shipped Cornflower Blue with #ffb805: 6 real palettes, including Mastodon hosted on mastodon.social's brand system and Blueprint, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #ffb805 in 5 real palettes, including Tabloid and Tequila Sunrise, as the lead colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #ffb805 in 4 real palettes, including Farmers Market and Miro's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #ffb805: 9 real palettes, including Warner Bros.'s brand system and Wikipedia's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #ffb805: 5 real palettes, including Heatwave and PostHog's brand system, as the accent.
Midnight Blue #191970
shipped4 real palettes, including Open House and FIFA's brand system put Midnight Blue beside #ffb805, as the text colour against it.
Real palettes that use #ffb805
Tints & shades
Harmonies
Contrast
| #ffb805 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.73:1 | fail | fail | fail | |
Aaon black | 12.11:1 | 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 #ffb805 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
#ffb805 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ffb805
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 #ffb805 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ffb805-c4bd9c-62b2cb-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