Color
#371e71
#371e71rgb(55, 30, 113)hsl(258, 58%, 28%)oklch(0.323 0.134 290.7)Colors that go with #371e71
Charcoal, Royal Blue 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 for #371e71: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #371e71's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped4 real palettes, including Sketch's brand system and Alaska Airlines's brand system put Blue beside #371e71, as the accent.
Crimson #dc143c
shippedCrimson is paired with #371e71 in 5 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #371e71: 12 real palettes, including Bank of America's brand system and Panasonic's brand system, as the accent.
Orange Red #ff4500
shippedOrange Red is paired with #371e71 in 5 real palettes, including Tide's brand system and NASA's brand system, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #371e71: 5 real palettes, including Frost & Ember and Glacier, as the supporting colour.
Sky Blue #87ceeb
shippedSky Blue is paired with #371e71 in 4 real palettes, including Boeing's brand system and Harbour, as the supporting colour.
Real palettes that use #371e71
Tints & shades
Harmonies
Contrast
| #371e71 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.24:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.59:1 | 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 #371e71 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
#371e71 reads as cool, dark, luxury. 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 #371e71 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/371e71-ad9cc4-dfc44e-291f2d-e9ebf1?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