Color
#e21603
#e21603rgb(226, 22, 3)hsl(5, 97%, 45%)oklch(0.579 0.23 30.1)Colors that go with #e21603
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 body-text near-black for #e21603: 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 #e21603 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #e21603 — 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 #e21603: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #e21603 in 5 real palettes, including Wired's brand system and Maple, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #e21603 in 8 real palettes, including native Cybersecurity's brand system and Tim Hortons's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #e21603 in 14 real palettes, including Netflix's brand system and State Farm's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #e21603 in 5 real palettes, including Databricks's brand system and Replit's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #e21603
Tints & shades
Harmonies
Contrast
| #e21603 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.83:1 | pass | pass | fail |
|
Aaon black | 4.35:1 | 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 #e21603 as the background.
Brands using this color
- WWEsecondary · #e40707 · Δ0.675
- Formula 1secondary · #e10600 · Δ0.744
- Netflixprimary · #e50914 · Δ1.018
- Lenovosecondary · #e1251b · Δ1.127
- Nintendosecondary · #e60012 · Δ1.212
- Pinterestsecondary · #dd0e0e · Δ1.293
- Toyotasecondary · #e10a1d · Δ1.398
- Lay'saccent · #df2027 · Δ1.681
- Twitchaccent · #eb0400 · Δ1.718
- Wiredsecondary · #eb0000 · Δ1.727
- MAC Cosmeticssecondary · #da1717 · Δ1.752
- Codecademyaccent · #dc2626 · Δ1.83
- Databrickssecondary · #eb1600 · Δ1.833
- LGsecondary · #ea1917 · Δ1.837
- native Cybersecuritysecondary · #ec0000 · Δ1.912
- Pinterestprimary · #e40424 · Δ1.921
- Pinterestaccent · #e60023 · Δ1.994
Fonts for this mood
#e21603 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 #e21603 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/e21603-c4a49c-62cba1-2d261f-f1e9ec?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