Color
#581dbf
#581dbfrgb(88, 29, 191)hsl(262, 74%, 43%)oklch(0.434 0.223 289.9)Colors that go with #581dbf
Olive Green, Charcoal and Slate Gray 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #581dbf on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #581dbf: softer than #000 and cool enough to feel like part of the same palette.
Slate Gray #708090
shippedSlate Gray is paired with #581dbf in 3 real palettes, including Indigo SaaS and Ink & Paper, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Forest Green #228b22
split-complementForest Green is a split-complement of #581dbf: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Royal Blue #4169e1
analogousshippedRoyal Blue is #581dbf's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dark Orchid #9932cc
analogousshippedDark Orchid is #581dbf's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Crimson #dc143c
shippedCrimson is paired with #581dbf in two real palettes: Gemstone and Behance's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Medium Slate Blue #7b68ee
shippedMedium Slate Blue is paired with #581dbf in two real palettes: ClickUp's brand system and Stripe's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #581dbf
Tints & shades
Harmonies
Contrast
| #581dbf as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.96:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.34:1 | 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 #581dbf as the background.
Brands using this color
Fonts for this mood
#581dbf reads as cool, vivid, technical. 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 #581dbf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/581dbf-af9cc4-dfce4e-2a1f2d-e9eaf1?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