Color

#1a56ef

#1a56ef
hex#1a56ef
rgbrgb(26, 86, 239)
hslhsl(223, 87%, 52%)
oklchoklch(0.523 0.237 263.7)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1311

Colors that go with #1a56ef

Charcoal, Crimson and Amber 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 →

#efb31a

#1ac1ef · #481aef

#ef1a56 · #56ef1a

Split-complementary

Open in tool →

#ef481a · #c1ef1a

#ef1ac1 · #efb31a · #1aef48

Contrast

#1a56ef as textRatioAAAA largeAAAFix
Aaon white
5.8:1passpassfail
  • AAA: use #0f49db as the text (7.01:1)
Aaon black
3.62:1failpassfail
  • AA: use #376cf1 as the text (4.58:1)
  • AAA: use #6b92f5 as the text (7.06:1)
  • AA: or shift the background to #e3e3e3 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1a56ef as the background.

Brands using this color

Fonts for this mood

#1a56ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1a56ef
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 #1a56ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1a56ef-9ca3c4-df704e-211f2d-e9eff1?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