Color

#2d3e4d

#2d3e4d
hex#2d3e4d
rgbrgb(45, 62, 77)
hslhsl(208, 26%, 24%)
oklchoklch(0.356 0.034 245.6)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0454

Colors that go with #2d3e4d

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 →

#4d3c2d

#2d4d4c · #2d2e4d

#4d2d3e · #3e4d2d

Split-complementary

Open in tool →

#4d2d2e · #4d4c2d

#4c2d4d · #4d3c2d · #2e4d2d

Contrast

#2d3e4d as textRatioAAAA largeAAAFix
Aaon white
11.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.91:1failfailfail
  • AA: use #597a97 as the text (4.66:1)
  • AAA: use #7e9bb4 as the text (7.23:1)
  • AA: or shift the background to #a6a6a6 (4.52:1)
  • AAA: or shift the background to #cfcfcf (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 #2d3e4d as the background.

Brands using this color

Fonts for this mood

#2d3e4d reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2d3e4d
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 #2d3e4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2d3e4d-9cadc4-df4e51-1f212d-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