Color

#a21607

#a21607
hex#a21607
rgbrgb(162, 22, 7)
hslhsl(6, 92%, 33%)
oklchoklch(0.456 0.175 30.4)
Closest name: Bleeding Crimson (#9b1414)Relative luminance 0.0827

Colors that go with #a21607

Royal Blue, Teal and Crimson 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 →

#0792a2

#a20745 · #a26407

#07a216 · #1607a2

Split-complementary

Open in tool →

#07a264 · #0745a2

#45a207 · #0792a2 · #6407a2

Contrast

#a21607 as textRatioAAAA largeAAAFix
Aaon white
7.91:1passpasspassPasses AAA — no fix needed.
Aaon black
2.65:1failfailfail
  • AA: use #e6200a as the text (4.58:1)
  • AAA: use #f86859 as the text (7.12:1)
  • AA: or shift the background to #c4c4c4 (4.54:1)
  • AAA: or shift the background to #f2f2f2 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a21607 as the background.

Brands using this color

Fonts for this mood

#a21607 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a21607
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 #a21607 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a21607-c4a59c-62cba3-2d271f-f1e9ec?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