Color
#403bd8
#403bd8rgb(64, 59, 216)hsl(242, 67%, 54%)oklch(0.473 0.229 274.6)Colors that go with #403bd8
Charcoal, Sea Green and Amber 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 #403bd8: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #403bd8 — 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 #403bd8 in 6 real palettes, including Walmart's brand system and Warner Bros.'s brand system, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #403bd8: 10 real palettes, including Qualcomm's brand system and Blue Mono, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #403bd8 in 12 real palettes, including Behance's brand system and Coinbase's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #403bd8: 8 real palettes, including Coursera's brand system and HashiCorp's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #403bd8: 4 real palettes, including Nissan's brand system and Campbell's's brand system, as the supporting colour.
Light Sky Blue #87cefa
shippedLight Sky Blue is paired with #403bd8 in 4 real palettes, including 1password's brand system and Telehealth, as the supporting colour.
Real palettes that use #403bd8
Tints & shades
Harmonies
Contrast
| #403bd8 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.41:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.84:1 | 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 #403bd8 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
#403bd8 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 #403bd8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/403bd8-a29cc4-df9e4e-261f2d-e9edf1?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