Color

#5581be

#5581be
hex#5581be
rgbrgb(85, 129, 190)
hslhsl(215, 45%, 54%)
oklchoklch(0.598 0.106 256.8)
Closest name: steelblue (#4682b4)Relative luminance 0.2135

Colors that go with #5581be

Charcoal, Copper 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 →

#be9255

#55b6be · #5e55be

#be5581 · #81be55

Split-complementary

Open in tool →

#be5e55 · #b6be55

#be55b6 · #be9255 · #55be5e

Contrast

#5581be as textRatioAAAA largeAAAFix
Aaon white
3.98:1failpassfail
  • AA: use #4676b9 as the text (4.61:1)
  • AAA: use #355a8d as the text (7:1)
  • AA: or shift the background to #141414 (4.62:1)
Aaon black
5.27:1passpassfail
  • AAA: use #769acb as the text (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5581be 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

#5581be reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5581be
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 #5581be and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5581be-9ca8c4-df5d4e-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