Color
#661b79
#661b79rgb(102, 27, 121)hsl(288, 64%, 29%)oklch(0.389 0.158 318.5)Colors that go with #661b79
Tomato, Forest 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
shipped4 real palettes, including FedEx's brand system and Golden Hour put Tomato beside #661b79, as the supporting colour.
Forest Green #228b22
complementaryForest Green sits directly opposite #661b79 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 #661b79: softer than #000 and cool enough to feel like part of the same palette.
Olive Green #808000
split-complementOlive Green is a split-complement of #661b79: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #661b79: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #661b79 in two real palettes: Lenovo's brand system and Wells Fargo's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #661b79: two real palettes: Slack's brand system and Hinge's brand system, as the lead colour.
Sandy Brown #f4a460
shippedSandy Brown is paired with #661b79 in two real palettes: Dusk Gradient and Golden Hour, as the supporting colour.
Real palettes that use #661b79
Tints & shades
Harmonies
Contrast
| #661b79 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.51:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2:1 | 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 #661b79 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
#661b79 reads as cool, vivid, dark. 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 #661b79 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/661b79-be9fc1-aacb62-2d1f2a-ece9f1?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