Color

#90100e

#90100e
hex#90100e
rgbrgb(144, 16, 14)
hslhsl(1, 82%, 31%)
oklchoklch(0.418 0.161 28.3)
Closest name: Brick Red (#8f1402)Relative luminance 0.0633

Colors that go with #90100e

Teal, Crimson and Taupe 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.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#0e8e90

#900e4d · #90510e

#0e9010 · #100e90

Split-complementary

Open in tool →

#0e9051 · #0e4d90

#4d900e · #0e8e90 · #510e90

Contrast

#90100e as textRatioAAAA largeAAAFix
Aaon white
9.27:1passpasspassPasses AAA — no fix needed.
Aaon black
2.27:1failfailfail
  • AA: use #e81a17 as the text (4.59:1)
  • AAA: use #f06d6a as the text (7.1:1)
  • AA: or shift the background to #b5b5b5 (4.52:1)
  • AAA: or shift the background to #e0e0e0 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #90100e as the background.

Brands using this color

Fonts for this mood

#90100e reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #90100e
live endpoint

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.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #90100e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/90100e-c4a19c-62cb9a-2d261f-f1e9ed?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md