Color
#287d8a
#287d8argb(40, 125, 138)hsl(188, 55%, 35%)oklch(0.545 0.081 209.6)Colors that go with #287d8a
Charcoal, Rust and Cobalt 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #287d8a: softer than #000 and cool enough to feel like part of the same palette.
Rust #b7410e
complementaryshippedRust sits directly opposite #287d8a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #287d8a: 6 real palettes, including Fintech Trust and Glacier, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #287d8a: 6 real palettes, including Riverbed and Wellness, as the accent.
Crimson #dc143c
shippedCrimson is paired with #287d8a in 10 real palettes, including Redfin's brand system and Retro Pop, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #287d8a: 13 real palettes, including Discover's brand system and Campus, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #287d8a: 4 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #287d8a in 6 real palettes, including Sapphire & Gold and Mid-Century, as the supporting colour.
Real palettes that use #287d8a
Tints & shades
Harmonies
Contrast
| #287d8a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.78:1 | pass | pass | fail |
|
Aaon black | 4.39:1 | fail | 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 #287d8a as the background.
Brands using this color
Fonts for this mood
#287d8a reads as cool, modern. 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 #287d8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/287d8a-a2b7be-df4e81-1f252d-e9f1ee?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