Color
#371f75
#371f75rgb(55, 31, 117)hsl(257, 58%, 29%)oklch(0.328 0.138 289.3)Colors that go with #371f75
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 #371f75: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #371f75'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 Alaska Airlines's brand system and Sketch's brand system put Blue beside #371f75, as the accent.
Crimson #dc143c
shippedCrimson is paired with #371f75 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 #371f75: 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 #371f75 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 #371f75: 4 real palettes, including Frost & Ember and Glacier, as the supporting colour.
Slate Gray #708090
shipped4 real palettes, including Campus and Bloomberg's brand system put Slate Gray beside #371f75, as the supporting colour.
Real palettes that use #371f75
Tints & shades
Harmonies
Contrast
| #371f75 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.62:1 | 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 #371f75 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
#371f75 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 #371f75 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/371f75-ac9cc4-dfc24e-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