Color

#255cbb

#255cbb
hex#255cbb
rgbrgb(37, 92, 187)
hslhsl(218, 67%, 44%)
oklchoklch(0.494 0.161 260.6)
Closest name: Denim (#1560bd)Relative luminance 0.1164

Colors that go with #255cbb

Charcoal, Crimson and Amber 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 →

#bb8425

#25a7bb · #3925bb

#bb255c · #5cbb25

Split-complementary

Open in tool →

#bb3925 · #a7bb25

#bb25a7 · #bb8425 · #25bb39

Contrast

#255cbb as textRatioAAAA largeAAAFix
Aaon white
6.31:1passpassfail
  • AAA: use #2254aa as the text (7.2:1)
Aaon black
3.33:1failpassfail
  • AA: use #3772d7 as the text (4.55:1)
  • AAA: use #6a96e2 as the text (7.07:1)
  • AA: or shift the background to #dbdbdb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #255cbb as the background.

Brands using this color

Fonts for this mood

#255cbb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #255cbb
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 #255cbb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/255cbb-9ca6c4-df644e-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