Color

#001bc7

#001bc7
hex#001bc7
rgbrgb(0, 27, 199)
hslhsl(232, 100%, 39%)
oklchoklch(0.391 0.249 264.2)
Closest name: mediumblue (#0000cd)Relative luminance 0.0491

Colors that go with #001bc7

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 →

#c7ac00

#007ec7 · #4900c7

#c7001b · #1bc700

Split-complementary

Open in tool →

#c74900 · #7ec700

#c7007e · #c7ac00 · #00c749

Contrast

#001bc7 as textRatioAAAA largeAAAFix
Aaon white
10.6:1passpasspassPasses AAA — no fix needed.
Aaon black
1.98:1failfailfail
  • AA: use #4d64ff as the text (4.58:1)
  • AAA: use #7a8cff as the text (7.02:1)
  • AA: or shift the background to #ababab (4.62:1)
  • AAA: or shift the background to #d4d4d4 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #001bc7 as the background.

Brands using this color

Fonts for this mood

#001bc7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #001bc7
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 #001bc7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/001bc7-9c9dc4-df864e-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