Color
#631ec2
#631ec2rgb(99, 30, 194)hsl(265, 73%, 44%)oklch(0.45 0.225 293.9)Colors that go with #631ec2
Royal Blue, Charcoal and Tomato 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 #631ec2'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 #631ec2: softer than #000 and cool enough to feel like part of the same palette.
Tomato #ff6347
shipped5 real palettes, including GitLab's brand system and dbt Labs's brand system put Tomato beside #631ec2, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #631ec2 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #631ec2: 3 real palettes, including Zillow's brand system and Unilever's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #631ec2: 3 real palettes, including Peacock's brand system and Blue Mono, as the accent.
Crimson #dc143c
shippedCrimson is paired with #631ec2 in 3 real palettes, including Gemstone and Wells Fargo's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #631ec2: 3 real palettes, including Slack's brand system and Linkedin's brand system, as the lead colour.
Real palettes that use #631ec2
Tints & shades
Harmonies
Contrast
| #631ec2 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.42:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.5:1 | 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 #631ec2 as the background.
Brands using this color
Fonts for this mood
#631ec2 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 #631ec2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/631ec2-b19cc4-dfd54e-2b1f2d-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