Color
#370b41
#370b41rgb(55, 11, 65)hsl(289, 71%, 15%)oklch(0.256 0.102 319.4)Colors that go with #370b41
Charcoal, Sienna and Slate 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 #370b41: softer than #000 and cool enough to feel like part of the same palette.
Sienna #a0522d
triadicshippedSienna completes a triad with #370b41 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Blue #6a5acd
analogousshippedSlate Blue is #370b41's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
split-complementshippedTeal is a split-complement of #370b41: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Forest Green #228b22
complementaryshippedForest Green sits directly opposite #370b41 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #370b41 in 10 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent.
Blue #0000ff
shipped14 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #370b41, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #370b41 in 4 real palettes, including Coastal and Kiln, as the accent.
Real palettes that use #370b41
Tints & shades
Harmonies
Contrast
| #370b41 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.32:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.29:1 | 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 #370b41 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
#370b41 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 #370b41 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/370b41-be9fc1-a8cb62-2d1f2a-ece9f1?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