Color

#21736b

#21736b
hex#21736b
rgbrgb(33, 115, 107)
hslhsl(174, 55%, 29%)
oklchoklch(0.505 0.078 185.6)
Closest name: Deep Pool Teal (#366d68)Relative luminance 0.1365

Colors that go with #21736b

Charcoal, Crimson and Cobalt 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.

Real palettes that use #21736b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#732129

#217342 · #215273

#6a2173 · #736a21

Split-complementary

Open in tool →

#732152 · #734221

#422173 · #732129 · #527321

Contrast

#21736b as textRatioAAAA largeAAAFix
Aaon white
5.63:1passpassfail
  • AAA: use #1d635c as the text (7.02:1)
Aaon black
3.73:1failpassfail
  • AA: use #268279 as the text (4.55:1)
  • AAA: use #30a69a as the text (7.05:1)
  • AA: or shift the background to #e6e6e6 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21736b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#21736b reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21736b
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 #21736b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21736b-a2bebe-d459a1-1f292d-e9f1ed?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