Color
#6331d8
#6331d8rgb(99, 49, 216)hsl(258, 68%, 52%)oklch(0.488 0.233 288.1)Colors that go with #6331d8
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 #6331d8: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #6331d8's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #6331d8 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #6331d8 in 4 real palettes, including Walmart's brand system and Mastodon hosted on mastodon.social's brand system, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #6331d8: 5 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 #6331d8: 6 real palettes, including Qualcomm's brand system and Roblox's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #6331d8 in 6 real palettes, including Gemstone and Wells Fargo's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #6331d8: 4 real palettes, including Kraken's brand system and Render's brand system, as the accent.
Real palettes that use #6331d8
Tints & shades
Harmonies
Contrast
| #6331d8 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.09:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.96:1 | 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 #6331d8 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
#6331d8 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 #6331d8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/6331d8-ad9cc4-dfc44e-291f2d-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