Color
#521c8d
#521c8drgb(82, 28, 141)hsl(269, 67%, 33%)oklch(0.378 0.171 299.6)Colors that go with #521c8d
Royal Blue, Crimson and Midnight Blue 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 #521c8d'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 #521c8d in 5 real palettes, including Wells Fargo's brand system and Lenovo's brand system, as the lead colour.
Midnight Blue #191970
shipped5 real palettes, including Kraken's brand system and Fintech Trust put Midnight Blue beside #521c8d, as the lead colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #521c8d: 4 real palettes, including FedEx's brand system and Fintech Trust, as the accent.
Tomato #ff6347
shipped4 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #521c8d, as the supporting colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #521c8d 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 #521c8d: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDesigners have shipped Denim with #521c8d: 3 real palettes, including Slack's brand system and Hinge's brand system, as the lead colour.
Real palettes that use #521c8d
Tints & shades
Harmonies
Contrast
| #521c8d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.91:1 | 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 #521c8d as the background.
Brands using this color
Fonts for this mood
#521c8d 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 #521c8d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/521c8d-b49cc4-cbcb62-2c1f2d-e9e9f1?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