Color

#2b4055

#2b4055
hex#2b4055
rgbrgb(43, 64, 85)
hslhsl(210, 33%, 25%)
oklchoklch(0.363 0.045 249.2)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0484

Tints & shades

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

Harmonies

Complementary

Open in tool →

#55402b

#2b5555 · #2b2b55

#552b40 · #40552b

Split-complementary

Open in tool →

#552b2b · #55552b

#552b55 · #55402b · #2b552b

Contrast

#2b4055 as textRatioAAAA largeAAAFix
Aaon white
10.67:1passpasspassPasses AAA — no fix needed.
Aaon black
1.97:1failfailfail
  • AA: use #50789f as the text (4.53:1)
  • AAA: use #7799bb as the text (7.06:1)
  • AA: or shift the background to #ababab (4.65:1)
  • AAA: or shift the background to #d4d4d4 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b4055 as the background.

Brands using this color

Fonts for this mood

#2b4055 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b4055
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #2b4055 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b4055-9cabc4-df514e-1f202d-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