Color
#663187
#663187rgb(102, 49, 135)hsl(277, 47%, 36%)oklch(0.425 0.143 310.1)Colors that go with #663187
Tomato, Sea Green and Charcoal 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.
Tomato #ff6347
shipped5 real palettes, including FedEx's brand system and Golden Hour put Tomato beside #663187, as the supporting colour.
Sea Green #2e8b57
complementarySea Green sits directly opposite #663187 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 #663187: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #663187 in 3 real palettes, including Wells Fargo's brand system and Lenovo's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #663187: 3 real palettes, including Slack's brand system and Hinge's brand system, as the lead colour.
Midnight Blue #191970
shipped3 real palettes, including Kraken's brand system and First Snow put Midnight Blue beside #663187, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #663187 in 3 real palettes, including Datadog's brand system and Superhuman's brand system, as that palette's text colour.
Teal #008080
triadicshippedTeal completes a triad with #663187 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #663187
Tints & shades
Harmonies
Contrast
| #663187 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.92:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.35:1 | 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 #663187 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
#663187 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 #663187 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/663187-b99cc4-bdcb62-2d1f2c-eae9f1?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