Color
#643fe9
#643fe9rgb(100, 63, 233)hsl(253, 79%, 58%)oklch(0.521 0.238 284.5)Colors that go with #643fe9
Crimson, Olive 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.
Crimson #dc143c
shippedCrimson is paired with #643fe9 in 5 real palettes, including Gemstone and Coinbase's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Olive Green #808000
complementaryOlive Green sits directly opposite #643fe9 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 #643fe9: softer than #000 and cool enough to feel like part of the same palette.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #643fe9 in 3 real palettes, including Indigo SaaS and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #643fe9 in 3 real palettes, including Discord's brand system and Telehealth, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #643fe9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Gray #708090
shippedSlate Gray is paired with #643fe9 in 3 real palettes, including Indigo SaaS and Campus, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Forest Green #228b22
split-complementForest Green is a split-complement of #643fe9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #643fe9
Tints & shades
Harmonies
Contrast
| #643fe9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.12:1 | pass | pass | fail |
|
Aaon black | 3.43:1 | 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 #643fe9 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
#643fe9 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 #643fe9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/643fe9-a99cc4-dfb84e-281f2d-e9ebf1?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