Color
#3664c9
#3664c9rgb(54, 100, 201)hsl(221, 58%, 50%)oklch(0.527 0.165 263.4)Colors that go with #3664c9
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 #3664c9: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #3664c9 — 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 #3664c9 in 10 real palettes, including Wikipedia's brand system and Warner Bros.'s brand system, as the accent.
Blue #0000ff
shipped16 real palettes, including Pixar's brand system and Activision's brand system put Blue beside #3664c9, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #3664c9: 7 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #3664c9 in 19 real palettes, including Netflix's brand system and Ulta Beauty's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #3664c9: 7 real palettes, including Venmo's brand system and Astro's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #3664c9: 8 real palettes, including HashiCorp's brand system and Apple's brand system, as the supporting colour.
Real palettes that use #3664c9
Tints & shades
Harmonies
Contrast
| #3664c9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.49:1 | pass | pass | fail |
|
Aaon black | 3.82:1 | 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 #3664c9 as the background.
Brands using this color
- Wikipediasecondary · #3366cc · Δ0.658
- Campbell'saccent · #3860be · Δ1.899
- Coca-Colaaccent · #3860be · Δ1.899
- Guinnessaccent · #3860be · Δ1.899
- Heinzaccent · #3860be · Δ1.899
- Hingeaccent · #3860be · Δ1.899
- Jack Daniel'sprimary · #3860be · Δ1.899
- L'Oréalaccent · #3860be · Δ1.899
- Maybellineaccent · #3860be · Δ1.899
- Netflixaccent · #3860be · Δ1.899
- Nikonsecondary · #3860be · Δ1.899
- Paramount+primary · #3860be · Δ1.899
- Pixarsecondary · #3860be · Δ1.899
- Starlinksecondary · #3860be · Δ1.899
- Ulta Beautysecondary · #3860be · Δ1.899
- Victoria's Secretaccent · #3860be · Δ1.899
- Warner Bros.secondary · #3860be · Δ1.899
Fonts for this mood
#3664c9 reads as cool, modern. 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 #3664c9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3664c9-9ca4c4-df6b4e-211f2d-e9eff1?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