Color
#331e6b
#331e6brgb(51, 30, 107)hsl(256, 56%, 27%)oklch(0.313 0.126 289.6)Colors that go with #331e6b
Royal Blue, Charcoal and Denim 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #331e6b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #331e6b: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDenim is paired with #331e6b in 12 real palettes, including Bank of America's brand system and Discover's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Light Pink #ffb6c1
shippedLight Pink is paired with #331e6b in 4 real palettes, including Railway's brand system and Macaron, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Powder Blue #b0e0e6
shippedPowder Blue is paired with #331e6b in 6 real palettes, including Frost & Ember and Glacier, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sky Blue #87ceeb
shippedSky Blue is paired with #331e6b in 6 real palettes, including Boeing's brand system and Harbour, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Steel Blue #4682b4
shippedSteel Blue is paired with #331e6b in 9 real palettes, including Discover's brand system and Plaid's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Olive Green #808000
complementaryOlive Green sits directly opposite #331e6b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #331e6b
Tints & shades
Harmonies
Contrast
| #331e6b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.65:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.54:1 | 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 #331e6b 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
#331e6b 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 #331e6b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/331e6b-ab9cc4-dfbf4e-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