Color
#6b40ba
#6b40bargb(107, 64, 186)hsl(261, 49%, 49%)oklch(0.489 0.182 295)Colors that go with #6b40ba
Charcoal, Royal Blue and Sea Green 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #6b40ba: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #6b40ba's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of #6b40ba: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #6b40ba in 6 real palettes, including Gemstone and Netflix's brand system, as the accent.
Midnight Blue #191970
shipped7 real palettes, including Kraken's brand system and Paramount+'s brand system put Midnight Blue beside #6b40ba, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #6b40ba on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #6b40ba: 3 real palettes, including Coca-Cola's brand system and Blue Mono, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #6b40ba: 3 real palettes, including Datadog's brand system and Campbell's's brand system, as the accent.
Real palettes that use #6b40ba
Tints & shades
Harmonies
Contrast
| #6b40ba as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.85:1 | pass | pass | fail |
|
Aaon black | 3.07:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6b40ba as the background.
Brands using this color
Fonts for this mood
#6b40ba 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 #6b40ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/6b40ba-af9cc4-dfcb4e-2a1f2d-e9eaf1?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