Color
#21609c
#21609crgb(33, 96, 156)hsl(209, 65%, 37%)oklch(0.48 0.116 250.8)Colors that go with #21609c
Charcoal, Crimson 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 #21609c: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #21609c — 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 #21609c in 7 real palettes, including Warner Bros.'s brand system and Lemon Squeezy's brand system, as the accent.
Blue #0000ff
shipped5 real palettes, including Pixar's brand system and CVS's brand system put Blue beside #21609c, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #21609c: 4 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #21609c: 4 real palettes, including AT&T's brand system and Campbell's's brand system, as the accent.
Light Coral #f08080
shippedDesigners have shipped Light Coral with #21609c: 4 real palettes, including Target : Expect More. Pay Less.'s brand system and Cobalt Pop, as the supporting colour.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #21609c in 4 real palettes, including Fintech Trust and Khan Academy's brand system, as the accent.
Real palettes that use #21609c
Tints & shades
Harmonies
Contrast
| #21609c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.53:1 | pass | pass | fail |
|
Aaon black | 3.22:1 | 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 #21609c as the background.
Brands using this color
Fonts for this mood
#21609c 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 #21609c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21609c-9cacc4-df4e4e-1f212d-e9f1f1?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