Color
#661cab
#661cabrgb(102, 28, 171)hsl(271, 72%, 39%)oklch(0.43 0.205 301)Colors that go with #661cab
Olive Green, Charcoal and Teal 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #661cab 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 #661cab: softer than #000 and cool enough to feel like part of the same palette.
Teal #008080
triadicshippedTeal completes a triad with #661cab — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #661cab: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue Violet #8a2be2
shippedBlue Violet is paired with #661cab in two real palettes: Twitch's brand system and Taco Bell's brand system, as the lead colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #661cab: two real palettes: Peacock's brand system and Blue Mono, as the accent.
Crimson #dc143c
shippedCrimson is paired with #661cab in two real palettes: Gemstone and Lenovo's brand system, as the accent.
Midnight Blue #191970
shippedTwo real palettes: Kraken's brand system and Blue Mono put Midnight Blue beside #661cab, as the lead colour.
Real palettes that use #661cab
Tints & shades
Harmonies
Contrast
| #661cab as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.06:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.32:1 | 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 #661cab 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
#661cab 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 #661cab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/661cab-b59cc4-c7cb62-2c1f2d-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