Color
#581d55
#581d55rgb(88, 29, 85)hsl(303, 50%, 23%)oklch(0.345 0.114 329.8)Colors that go with #581d55
Sea Green, Blue and Crimson 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.
Sea Green #2e8b57
complementaryshippedSea Green sits directly opposite #581d55 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Sketch's brand system and Tim Hortons's brand system put Blue beside #581d55, as the accent.
Crimson #dc143c
shippedCrimson is paired with #581d55 in 7 real palettes, including Lenovo's brand system and Tim Hortons's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #581d55: 5 real palettes, including Hinge's brand system and Heinz's brand system, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #581d55: 5 real palettes, including Macaron and Sorbet, as the supporting colour.
Sky Blue #87ceeb
shippedSky Blue is paired with #581d55 in 4 real palettes, including Harbour and Dusty Blue, as the supporting colour.
Slate Gray #708090
shipped4 real palettes, including Bloomberg's brand system and Hermès's brand system put Slate Gray beside #581d55, as the accent.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #581d55: softer than #000 and cool enough to feel like part of the same palette.
Real palettes that use #581d55
Tints & shades
Harmonies
Contrast
| #581d55 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.2:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.72:1 | 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 #581d55 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
#581d55 reads as warm, 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 #581d55 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/581d55-c19fbb-8fcb62-2d1f26-eee9f1?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