Color

#2d3b4e

#2d3b4e
hex#2d3b4e
rgbrgb(45, 59, 78)
hslhsl(215, 27%, 24%)
oklchoklch(0.348 0.038 256.2)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0424

Colors that go with #2d3b4e

Dark Olive Green, Sea Green and Teal 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 →

#4e402d

#2d4b4e · #2f2d4e

#4e2d3a · #3a4e2d

Split-complementary

Open in tool →

#4e2f2d · #4b4e2d

#4e2d4b · #4e402d · #2d4e2f

Contrast

#2d3b4e as textRatioAAAA largeAAAFix
Aaon white
11.37:1passpasspassPasses AAA — no fix needed.
Aaon black
1.85:1failfailfail
  • AA: use #5b779f as the text (4.58:1)
  • AAA: use #8197b6 as the text (7.04:1)
  • AA: or shift the background to #a3a3a3 (4.51:1)
  • AAA: or shift the background to #cccccc (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2d3b4e as the background.

Brands using this color

Fonts for this mood

#2d3b4e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2d3b4e
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 #2d3b4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2d3b4e-9ca8c4-df5d4e-201f2d-e9f0f1?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