Color

#2b3755

#2b3755
hex#2b3755
rgbrgb(43, 55, 85)
hslhsl(223, 33%, 25%)
oklchoklch(0.341 0.055 266.9)
Closest name: Capital Blue (#1a4157)Relative luminance 0.039

Tints & shades

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

Harmonies

Complementary

Open in tool →

#55492b

#2b4c55 · #342b55

#552b37 · #37552b

Split-complementary

Open in tool →

#55342b · #4c552b

#552b4c · #55492b · #2b5534

Contrast

#2b3755 as textRatioAAAA largeAAAFix
Aaon white
11.8:1passpasspassPasses AAA — no fix needed.
Aaon black
1.78:1failfailfail
  • AA: use #5c73ad as the text (4.51:1)
  • AAA: use #8596c1 as the text (7.13:1)
  • AA: or shift the background to #a1a1a1 (4.57:1)
  • AAA: or shift the background to #c9c9c9 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b3755 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#2b3755 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b3755
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 #2b3755 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b3755-9ca3c4-df704e-211f2d-e9eff1?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