Color
#370e4e
#370e4ergb(55, 14, 78)hsl(278, 70%, 18%)oklch(0.27 0.112 310.1)Colors that go with #370e4e
Charcoal, Slate Blue and Teal 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 #370e4e: softer than #000 and cool enough to feel like part of the same palette.
Slate Blue #6a5acd
analogousshippedSlate Blue is #370e4e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with #370e4e — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Olive Drab #6b8e23
complementaryshippedOlive Drab sits directly opposite #370e4e on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shippedBlue is paired with #370e4e in 10 real palettes, including Sketch's brand system and Monzo's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #370e4e in 5 real palettes, including Open House and Dusk, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #370e4e in 6 real palettes, including Blue Mono and Fintech Trust, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Copper #b87333
shippedCopper is paired with #370e4e in 4 real palettes, including Dusk and Wellness, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #370e4e
Tints & shades
Harmonies
Contrast
| #370e4e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.73:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.34:1 | 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 #370e4e as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#370e4e 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 #370e4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/370e4e-ba9cc4-bbcb62-2d1f2c-ebe9f1?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