Color
#ef0b0b
#ef0b0brgb(239, 11, 11)hsl(0, 91%, 49%)oklch(0.6 0.243 28.9)Colors that go with #ef0b0b
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 #ef0b0b: 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 #ef0b0b — 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 #ef0b0b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #ef0b0b in 7 real palettes, including Wired's brand system and McDonald's's brand system, as the accent.
Blue #0000ff
shipped8 real palettes, including native Cybersecurity's brand system and Doordash's brand system put Blue beside #ef0b0b, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #ef0b0b: 5 real palettes, including Walgreens's brand system and NASA's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #ef0b0b: 19 real palettes, including Netflix's brand system and ElevenLabs's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #ef0b0b: 6 real palettes, including Databricks's brand system and Google's brand system, as the accent.
Real palettes that use #ef0b0b
Tints & shades
Harmonies
Contrast
| #ef0b0b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.45:1 | fail | pass | fail | |
Aaon black | 4.72:1 | pass | 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 #ef0b0b as the background.
Brands using this color
- Verceldanger · #ee0000 · Δ0.48
- Tindersecondary · #ec180e · Δ0.657
- native Cybersecuritysecondary · #ec0000 · Δ0.819
- Databrickssecondary · #eb1600 · Δ0.91
- Doordashsecondary · #eb1700 · Δ0.929
- Twitchaccent · #eb0400 · Δ0.95
- LGsecondary · #ea1917 · Δ0.991
- Wiredsecondary · #eb0000 · Δ1.009
- Gatoradesecondary · #ea0000 · Δ1.204
- Mattelsecondary · #ee0024 · Δ1.418
- Pizza Hutsecondary · #e91c24 · Δ1.497
Fonts for this mood
#ef0b0b 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 #ef0b0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/ef0b0b-c4a19c-62cb98-2d251f-f1e9ed?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