Color

#5b5fd2

#5b5fd2
hex#5b5fd2
rgbrgb(91, 95, 210)
hslhsl(238, 57%, 59%)
oklchoklch(0.545 0.174 277.4)
Closest name: slateblue (#6a5acd)Relative luminance 0.1506

Colors that go with #5b5fd2

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 →

#d2ce5b

#5b9ad2 · #925bd2

#d25b5f · #5fd25b

Split-complementary

Open in tool →

#d2925b · #9ad25b

#d25b9a · #d2ce5b · #5bd292

Contrast

#5b5fd2 as textRatioAAAA largeAAAFix
Aaon white
5.23:1passpassfail
  • AAA: use #3f43ca as the text (7.32:1)
Aaon black
4.01:1failpassfail
  • AA: use #676bd5 as the text (4.64:1)
  • AAA: use #8b8edf as the text (7.03:1)
  • AA: or shift the background to #f0f0f0 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b5fd2 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

#5b5fd2 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b5fd2
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 #5b5fd2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b5fd2-9f9cc4-df944e-251f2d-e9edf1?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