Color

#1055cb

#1055cb
hex#1055cb
rgbrgb(16, 85, 203)
hslhsl(218, 85%, 43%)
oklchoklch(0.487 0.195 261)
Closest name: Denim (#1560bd)Relative luminance 0.1092

Colors that go with #1055cb

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 →

#cb8710

#10b2cb · #2910cb

#cb1055 · #55cb10

Split-complementary

Open in tool →

#cb2910 · #b2cb10

#cb10b2 · #cb8710 · #10cb29

Contrast

#1055cb as textRatioAAAA largeAAAFix
Aaon white
6.6:1passpassfail
  • AAA: use #1051c1 as the text (7.07:1)
Aaon black
3.18:1failpassfail
  • AA: use #266fed as the text (4.58:1)
  • AAA: use #5f95f2 as the text (7.07:1)
  • AA: or shift the background to #d6d6d6 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1055cb as the background.

Brands using this color

Fonts for this mood

#1055cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1055cb
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 #1055cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1055cb-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