Crayon Box
Open in tool →Red, teal and yellow at crayon saturation — joyful, but on white with black type so it stays readable for grown-ups.
Color
#fc555drgb(252, 85, 93)hsl(357, 97%, 66%)oklch(0.679 0.203 21.7)Charcoal, Light Sea Green and Amber 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.
Charcoal is the body-text near-black for #fc555d: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Light Sea Green sits directly opposite #fc555d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue is paired with #fc555d in 6 real palettes, including Monzo's brand system and Readymag's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Crimson is paired with #fc555d in 4 real palettes, including Wise's brand system and Formula 1's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Denim is paired with #fc555d in 5 real palettes, including Strava's brand system and PlanetScale's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Dodger Blue is paired with #fc555d in 4 real palettes, including Figma's brand system and Heatwave, as the accent — a combination designers have actually shipped, not a computed rotation.
Gold is paired with #fc555d in 6 real palettes, including Streetwear and Night Market, as the accent — a combination designers have actually shipped, not a computed rotation.
| #fc555d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.18:1 | fail | pass | fail | |
Aaon black | 6.6:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #fc555d as the background.
#fc555d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #fc555d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/fc555d-c49f9c-62cb93-2d251f-f1e9ed?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