Color

#180fc7

#180fc7
hex#180fc7
rgbrgb(24, 15, 199)
hslhsl(243, 86%, 42%)
oklchoklch(0.388 0.251 267.4)
Closest name: mediumblue (#0000cd)Relative luminance 0.0466

Colors that go with #180fc7

Charcoal, Crimson 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 →

#bec70f

#0f62c7 · #740fc7

#c7180f · #0fc718

Split-complementary

Open in tool →

#c7740f · #62c70f

#c70f62 · #bec70f · #0fc774

Contrast

#180fc7 as textRatioAAAA largeAAAFix
Aaon white
10.87:1passpasspassPasses AAA — no fix needed.
Aaon black
1.93:1failfailfail
  • AA: use #6a62f3 as the text (4.65:1)
  • AAA: use #8e88f6 as the text (7:1)
  • AA: or shift the background to #a8a8a8 (4.57:1)
  • AAA: or shift the background to #d1d1d1 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #180fc7 as the background.

Brands using this color

Fonts for this mood

#180fc7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #180fc7
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 #180fc7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/180fc7-a39cc4-dfa04e-261f2d-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