Color

#21453c

#21453c
hex#21453c
rgbrgb(33, 69, 60)
hslhsl(165, 35%, 20%)
oklchoklch(0.36 0.045 175.4)
Closest name: Everglade (#264334)Relative luminance 0.0491

Colors that go with #21453c

Sea Green, Teal and 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#45212a

#21452a · #213c45

#3c2145 · #453c21

Split-complementary

Open in tool →

#45213c · #452a21

#2a2145 · #45212a · #3c4521

Contrast

#21453c as textRatioAAAA largeAAAFix
Aaon white
10.6:1passpasspassPasses AAA — no fix needed.
Aaon black
1.98:1failfailfail
  • AA: use #3f8372 as the text (4.7:1)
  • AAA: use #50a590 as the text (7.13:1)
  • AA: or shift the background to #ababab (4.62:1)
  • AAA: or shift the background to #d4d4d4 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21453c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#21453c reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21453c
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 #21453c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21453c-a2beba-d459b3-1f2b2d-e9f1eb?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