Color
#51336b
#51336brgb(81, 51, 107)hsl(272, 35%, 31%)oklch(0.383 0.097 307.1)Colors that go with #51336b
Blue, Crimson 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.
Blue #0000ff
shipped4 real palettes, including Alaska Airlines's brand system and Dunkin''s brand system put Blue beside #51336b, as the accent.
Crimson #dc143c
shippedCrimson is paired with #51336b in 9 real palettes, including Marvel's brand system and Casper Sleep's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #51336b: 9 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
Midnight Blue #191970
shipped10 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #51336b, as the accent.
Orange Red #ff4500
shippedOrange Red is paired with #51336b in 4 real palettes, including Tumblr's brand system and Audi's brand system, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #51336b: 7 real palettes, including Macaron and First Snow, as the supporting colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #51336b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Dark Olive Green #556b2f
complementaryDark Olive Green sits directly opposite #51336b 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 #51336b
Tints & shades
Harmonies
Contrast
| #51336b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.32:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.04:1 | 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 #51336b 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
#51336b reads as cool, modern. 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 #51336b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51336b-b69cc4-c5cb62-2d1f2d-eae9f1?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