Color

#5b77dc

#5b77dc
hex#5b77dc
rgbrgb(91, 119, 220)
hslhsl(227, 65%, 61%)
oklchoklch(0.598 0.157 269.5)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2059

Colors that go with #5b77dc

Charcoal, Sea Green 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 →

#dcc05b

#5bb8dc · #805bdc

#dc5b77 · #77dc5b

Split-complementary

Open in tool →

#dc805b · #b8dc5b

#dc5bb8 · #dcc05b · #5bdc80

Contrast

#5b77dc as textRatioAAAA largeAAAFix
Aaon white
4.1:1failpassfail
  • AA: use #4e6cda as the text (4.69:1)
  • AAA: use #2a4cc6 as the text (7.12:1)
  • AA: or shift the background to #121212 (4.56:1)
Aaon black
5.12:1passpassfail
  • AAA: use #7d93e3 as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b77dc as the background.

Brands using this color

Fonts for this mood

#5b77dc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b77dc
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 #5b77dc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b77dc-9ca0c4-df7a4e-221f2d-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