Color
#d21e2a
#d21e2argb(210, 30, 42)hsl(356, 75%, 47%)oklch(0.555 0.21 25.2)Colors that go with #d21e2a
Charcoal, Royal Blue and Steel Blue 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 body-text near-black for #d21e2a: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #d21e2a — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
split-complementshippedSteel Blue is a split-complement of #d21e2a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
complementaryshippedTeal sits directly opposite #d21e2a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #d21e2a in 6 real palettes, including McDonald's's brand system and Maple, as the lead colour.
Blue #0000ff
shipped7 real palettes, including Tim Hortons's brand system and native Cybersecurity's brand system put Blue beside #d21e2a, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #d21e2a: 6 real palettes, including Behance's brand system and Walgreens's brand system, as the supporting colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #d21e2a in 5 real palettes, including Farmers Market and Magazine Ochre, as the supporting colour.
Real palettes that use #d21e2a
Tints & shades
Harmonies
Contrast
| #d21e2a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.3:1 | pass | pass | fail |
|
Aaon black | 3.96:1 | 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 #d21e2a as the background.
Brands using this color
- GitHubdanger · #cf222e · Δ0.64
- Coinbasedanger · #cf202f · Δ0.715
- Burberrysecondary · #d5151f · Δ0.953
- Tim Hortonssecondary · #d0142c · Δ1.011
- Wells Fargoprimary · #d71e28 · Δ1.04
- Wiseaccent · #cb272f · Δ1.39
- Five Guyssecondary · #d21033 · Δ1.499
- Huaweiprimary · #cf0a2c · Δ1.602
- New Balancesecondary · #cf0a2c · Δ1.602
- Cartieraccent · #d50032 · Δ1.888
- MAC Cosmeticssecondary · #da1717 · Δ1.937
- Target : Expect More. Pay Less.primary · #dc142c · Δ1.957
Fonts for this mood
#d21e2a reads as warm, vivid, playful. 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 #d21e2a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/d21e2a-c49e9c-62cb91-2d241f-f1e9ee?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