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
#fdc330rgb(253, 195, 48)hsl(43, 98%, 59%)oklch(0.847 0.162 85)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 sits directly opposite #fdc330 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 is a split-complement of #fdc330: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson is paired with #fdc330 in 5 real palettes, including Tabloid and Diner, as the lead colour.
Dark Olive Green shows up next to #fdc330 in 4 real palettes, including Farmers Market and Miro's brand system, as the supporting colour.
Designers have shipped Denim with #fdc330: 8 real palettes, including Walmart's brand system and Warner Bros.'s brand system, as the lead colour.
Orange Red is paired with #fdc330 in 4 real palettes, including Heatwave and Brex's brand system, as the lead colour.
Designers have shipped Sage Green with #fdc330: 5 real palettes, including Polaroid and Chalkboard, as the supporting colour.
| #fdc330 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.61:1 | fail | fail | fail | |
Aaon black | 13.03:1 | 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 #fdc330 as the background.
Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.
Rust, pine and sun — high-visibility earth tones that read at a distance and on a trail sign.
#fdc330 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 #fdc330 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/fdc330-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