Color

#5787db

#5787db
hex#5787db
rgbrgb(87, 135, 219)
hslhsl(218, 65%, 60%)
oklchoklch(0.628 0.138 260.9)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2447

Colors that go with #5787db

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 →

#dbab57

#57cadb · #6857db

#db5787 · #87db57

Split-complementary

Open in tool →

#db6857 · #cadb57

#db57ca · #dbab57 · #57db68

Contrast

#5787db as textRatioAAAA largeAAAFix
Aaon white
3.56:1failpassfail
  • AA: use #3972d5 as the text (4.62:1)
  • AAA: use #2454a8 as the text (7.22:1)
  • AA: or shift the background to #212121 (4.52:1)
Aaon black
5.89:1passpassfail
  • AAA: use #6c96e0 as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5787db as the background.

Brands using this color

Fonts for this mood

#5787db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5787db
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 #5787db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5787db-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