Color
#643597
#643597rgb(100, 53, 151)hsl(269, 48%, 40%)oklch(0.439 0.155 302.5)Colors that go with #643597
Royal 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #643597'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 #643597 in 4 real palettes, including Wells Fargo's brand system and Lenovo's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #643597: 5 real palettes, including Slack's brand system and Hinge's brand system, as the lead colour.
Midnight Blue #191970
shipped4 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #643597, as the lead colour.
Tomato #ff6347
shipped6 real palettes, including FedEx's brand system and GitLab's brand system put Tomato beside #643597, as the supporting colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #643597 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 #643597: softer than #000 and cool enough to feel like part of the same palette.
Taupe #483c32
shippedTaupe is paired with #643597 in 3 real palettes, including Datadog's brand system and Superhuman's brand system, as that palette's text colour.
Real palettes that use #643597
Tints & shades
Harmonies
Contrast
| #643597 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.41:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.5:1 | 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 #643597 as the background.
Brands using this color
Fonts for this mood
#643597 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 #643597 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/643597-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