Color
#03151b
#03151brgb(3, 21, 27)hsl(195, 80%, 6%)oklch(0.183 0.028 221.1)Colors that go with #03151b
Charcoal, Amber and 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 that reads cleanly against #03151b without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #03151b in 7 real palettes, including Lemon Squeezy's brand system and Ember, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #03151b in 5 real palettes, including MongoDB's brand system and Monzo's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue Violet #8a2be2
shippedBlue Violet is paired with #03151b in 6 real palettes, including Klarna US's brand system and Neobank, as the accent — a combination designers have actually shipped, not a computed rotation.
Brown #a52a2a
shippedBrown is paired with #03151b in 4 real palettes, including Velvet and Garnet, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Burlywood #deb887
shippedBurlywood is paired with #03151b in 5 real palettes, including Velvet and Coffee Bar, as the accent — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #03151b in 8 real palettes, including Estate and Arctic, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Champagne #f7e7ce
shippedChampagne is paired with #03151b in 7 real palettes, including Midnight Luxe and Bramble, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #03151b
Tints & shades
Harmonies
Contrast
| #03151b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.63:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.13:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03151b as the background.
Brands using this color
Fonts for this mood
#03151b reads as cool, vivid, dark. 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 #03151b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/03151b-9cb5c4-df4e70-1f242d-e9f1ef?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