Color

#5871fd

#5871fd
hex#5871fd
rgbrgb(88, 113, 253)
hslhsl(231, 98%, 67%)
oklchoklch(0.607 0.209 271.2)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2098

Colors that go with #5871fd

Charcoal, Red and Sea Green 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 →

#fde558

#58c4fd · #9258fd

#fd5871 · #71fd58

Split-complementary

Open in tool →

#fd9258 · #c4fd58

#fd58c4 · #fde558 · #58fd92

Contrast

#5871fd as textRatioAAAA largeAAAFix
Aaon white
4.04:1failpassfail
  • AA: use #4964fd as the text (4.64:1)
  • AAA: use #1235fd as the text (7.11:1)
  • AA: or shift the background to #141414 (4.56:1)
Aaon black
5.2:1passpassfail
  • AAA: use #7c8ffe as the text (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5871fd 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

#5871fd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5871fd
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 #5871fd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5871fd-9c9ec4-df834e-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