Color
#cb0b11
#cb0b11rgb(203, 11, 17)hsl(358, 90%, 42%)oklch(0.532 0.214 28.1)Colors that go with #cb0b11
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 #cb0b11: 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 #cb0b11 — 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 #cb0b11: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
complementaryshippedTeal sits directly opposite #cb0b11 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 #cb0b11 in 6 real palettes, including Maple and McDonald's's brand system, as the accent.
Blue #0000ff
shipped6 real palettes, including Tim Hortons's brand system and native Cybersecurity's brand system put Blue beside #cb0b11, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #cb0b11: 4 real palettes, including Behance's brand system and MLB's brand system, as the supporting colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #cb0b11 in 4 real palettes, including Farmers Market and Olive Grove, as the supporting colour.
Real palettes that use #cb0b11
Tints & shades
Harmonies
Contrast
| #cb0b11 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.84:1 | pass | pass | fail |
|
Aaon black | 3.6:1 | 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 #cb0b11 as the background.
Brands using this color
Fonts for this mood
#cb0b11 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 #cb0b11 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/cb0b11-c49f9c-62cb95-2d251f-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