Color

#1b2afe

#1b2afe
hex#1b2afe
rgbrgb(27, 42, 254)
hslhsl(236, 99%, 55%)
oklchoklch(0.479 0.293 266.3)
Closest name: C64 Blue (#003aff)Relative luminance 0.0904

Colors that go with #1b2afe

Charcoal, Crimson and Cobalt 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 →

#feef1b

#1b9bfe · #7d1bfe

#fe1b2a · #2afe1b

Split-complementary

Open in tool →

#fe7d1b · #9bfe1b

#fe1b9b · #feef1b · #1bfe7d

Contrast

#1b2afe as textRatioAAAA largeAAAFix
Aaon white
7.48:1passpasspassPasses AAA — no fix needed.
Aaon black
2.81:1failfailfail
  • AA: use #5863fe as the text (4.63:1)
  • AAA: use #858dfe as the text (7.24:1)
  • AA: or shift the background to #c9c9c9 (4.51:1)
  • AAA: or shift the background to #fafafa (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b2afe as the background.

Brands using this color

Fonts for this mood

#1b2afe reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b2afe
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 #1b2afe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b2afe-9e9cc4-df8f4e-241f2d-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