Color

#0667ef

#0667ef
hex#0667ef
rgbrgb(6, 103, 239)
hslhsl(215, 95%, 48%)
oklchoklch(0.552 0.22 259.9)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1597

Colors that go with #0667ef

Charcoal, Crimson and Sienna 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 →

#ef8e06

#06dbef · #1906ef

#ef0667 · #67ef06

Split-complementary

Open in tool →

#ef1a06 · #dbef06

#ef06db · #ef8e06 · #06ef1a

Contrast

#0667ef as textRatioAAAA largeAAAFix
Aaon white
5.01:1passpassfail
  • AAA: use #0552bd as the text (7.12:1)
Aaon black
4.19:1failpassfail
  • AA: use #0b6ef9 as the text (4.61:1)
  • AAA: use #5198fb as the text (7.23:1)
  • AA: or shift the background to #f5f5f5 (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 #0667ef as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0667ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0667ef
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 #0667ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0667ef-9ca8c4-df5d4e-201f2d-e9f0f1?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