Color

#5b73dc

#5b73dc
hex#5b73dc
rgbrgb(91, 115, 220)
hslhsl(229, 65%, 61%)
oklchoklch(0.59 0.162 271)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1965

Colors that go with #5b73dc

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 →

#dcc45b

#5bb3dc · #845bdc

#dc5b73 · #73dc5b

Split-complementary

Open in tool →

#dc845b · #b3dc5b

#dc5bb3 · #dcc45b · #5bdc84

Contrast

#5b73dc as textRatioAAAA largeAAAFix
Aaon white
4.26:1failpassfail
  • AA: use #526bda as the text (4.69:1)
  • AAA: use #2c4ace as the text (7.05:1)
  • AA: or shift the background to #0f0f0f (4.5:1)
Aaon black
4.93:1passpassfail
  • AAA: use #8193e4 as the text (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b73dc as the background.

Brands using this color

Fonts for this mood

#5b73dc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b73dc
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 #5b73dc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b73dc-9c9fc4-df7e4e-231f2d-e9eef1?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