Color
#5b3271
#5b3271rgb(91, 50, 113)hsl(279, 39%, 32%)oklch(0.398 0.111 312.5)Colors that go with #5b3271
Charcoal, Sea Green 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #5b3271: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
complementaryshippedSea Green sits directly opposite #5b3271 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #5b3271 in 7 real palettes, including Lenovo's brand system and Wells Fargo's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #5b3271: 6 real palettes, including Hinge's brand system and Slack's brand system, as the accent.
Midnight Blue #191970
shipped6 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #5b3271, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #5b3271: 6 real palettes, including First Snow and Macaron, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #5b3271 in 5 real palettes, including Wayfair's brand system and Zoom's brand system, as the supporting colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #5b3271: 5 real palettes, including FedEx's brand system and Auth0's brand system, as the accent.
Real palettes that use #5b3271
Tints & shades
Harmonies
Contrast
| #5b3271 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.82:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.14:1 | 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 #5b3271 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
#5b3271 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 #5b3271 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5b3271-b99fc1-b9cb62-2d1f2c-ebe9f1?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