Color

#2b455a

#2b455a
hex#2b455a
rgbrgb(43, 69, 90)
hslhsl(207, 35%, 26%)
oklchoklch(0.379 0.048 243.9)
Closest name: Black Turmeric (#2c4364)Relative luminance 0.0551

Colors that go with #2b455a

Teal, Sienna 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 →

#5a402b

#2b5a57 · #2b2d5a

#5a2b45 · #455a2b

Split-complementary

Open in tool →

#5a2b2d · #5a572b

#572b5a · #5a402b · #2d5a2b

Contrast

#2b455a as textRatioAAAA largeAAAFix
Aaon white
9.99:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #4c799e as the text (4.54:1)
  • AAA: use #729abb as the text (7.06:1)
  • AA: or shift the background to #b0b0b0 (4.61:1)
  • AAA: or shift the background to #d9d9d9 (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 #2b455a as the background.

Brands using this color

Fonts for this mood

#2b455a reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b455a
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 #2b455a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b455a-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