Color

#371ef6

#371ef6
hex#371ef6
rgbrgb(55, 30, 246)
hslhsl(247, 92%, 54%)
oklchoklch(0.47 0.285 271.8)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0839

Colors that go with #371ef6

Charcoal, Cobalt Blue and Cornflower Blue 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 →

#dcf61e

#1e71f6 · #a31ef6

#f6371e · #1ef637

Split-complementary

Open in tool →

#f6a31e · #71f61e

#f61e71 · #dcf61e · #1ef6a3

Contrast

#371ef6 as textRatioAAAA largeAAAFix
Aaon white
7.84:1passpasspassPasses AAA — no fix needed.
Aaon black
2.68:1failfailfail
  • AA: use #6f5df8 as the text (4.6:1)
  • AAA: use #9789fa as the text (7.27:1)
  • AA: or shift the background to #c7c7c7 (4.64:1)
  • AAA: or shift the background to #f2f2f2 (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #371ef6 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

#371ef6 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #371ef6
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 #371ef6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/371ef6-a59cc4-dfaa4e-271f2d-e9ecf1?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