Color

#1b72fe

#1b72fe
hex#1b72fe
rgbrgb(27, 114, 254)
hslhsl(217, 99%, 55%)
oklchoklch(0.589 0.223 260.3)
Closest name: Bluerocratic (#1f66ff)Relative luminance 0.1942

Colors that go with #1b72fe

Charcoal, Crimson and Copper 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 →

#fea71b

#1be3fe · #351bfe

#fe1b72 · #72fe1b

Split-complementary

Open in tool →

#fe351b · #e3fe1b

#fe1be3 · #fea71b · #1bfe35

Contrast

#1b72fe as textRatioAAAA largeAAAFix
Aaon white
4.3:1failpassfail
  • AA: use #106bfe as the text (4.61:1)
  • AAA: use #014ecb as the text (7.11:1)
  • AA: or shift the background to #0d0d0d (4.52:1)
Aaon black
4.88:1passpassfail
  • AAA: use #5294fe as the text (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b72fe as the background.

Brands using this color

Fonts for this mood

#1b72fe reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b72fe
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 #1b72fe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b72fe-9ca7c4-df624e-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