Color

#253a4b

#253a4b
hex#253a4b
rgbrgb(37, 58, 75)
hslhsl(207, 34%, 22%)
oklchoklch(0.339 0.04 243.8)
Closest name: Astral Nomad (#203943)Relative luminance 0.0393

Colors that go with #253a4b

Dark Olive Green, Teal and Sienna 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 →

#4b3625

#254b49 · #25274b

#4b253a · #3a4b25

Split-complementary

Open in tool →

#4b2527 · #4b4925

#49254b · #4b3625 · #274b25

Contrast

#253a4b as textRatioAAAA largeAAAFix
Aaon white
11.76:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #4d799d as the text (4.54:1)
  • AAA: use #739aba as the text (7.06:1)
  • AA: or shift the background to #a1a1a1 (4.55:1)
  • AAA: or shift the background to #c9c9c9 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #253a4b as the background.

Brands using this color

Fonts for this mood

#253a4b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #253a4b
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 #253a4b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/253a4b-9cadc4-df4e53-1f212d-e9f1f1?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