Color
#631aea
#631aeargb(99, 26, 234)hsl(261, 83%, 51%)oklch(0.488 0.267 286.8)Colors that go with #631aea
Royal Blue, Charcoal and Cobalt Blue 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #631aea's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #631aea: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #631aea: 4 real palettes, including Zillow's brand system and Oreo's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #631aea: 4 real palettes, including Kraken's brand system and Render's brand system, as the accent.
Midnight Blue #191970
shipped4 real palettes, including Kraken's brand system and Penpot's brand system put Midnight Blue beside #631aea, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #631aea on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #631aea in 3 real palettes, including Gemstone and Coinbase's brand system, as the accent.
Medium Slate Blue #7b68ee
shippedMedium Slate Blue shows up next to #631aea in 3 real palettes, including ClickUp's brand system and Stripe's brand system, as the supporting colour.
Real palettes that use #631aea
Tints & shades
Harmonies
Contrast
| #631aea as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.33:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.87:1 | 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 #631aea 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
#631aea 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 #631aea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/631aea-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