Color

#1e51fa

#1e51fa
hex#1e51fa
rgbrgb(30, 81, 250)
hslhsl(226, 96%, 55%)
oklchoklch(0.526 0.255 264.9)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1306

Colors that go with #1e51fa

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 →

#fac71e

#1ec0fa · #591efa

#fa1e51 · #51fa1e

Split-complementary

Open in tool →

#fa591e · #c0fa1e

#fa1ec0 · #fac71e · #1efa59

Contrast

#1e51fa as textRatioAAAA largeAAAFix
Aaon white
5.81:1passpassfail
  • AAA: use #053df5 as the text (7.02:1)
Aaon black
3.61:1failpassfail
  • AA: use #3c69fb as the text (4.61:1)
  • AAA: use #7393fc as the text (7.31:1)
  • AA: or shift the background to #e3e3e3 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1e51fa as the background.

Brands using this color

Fonts for this mood

#1e51fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1e51fa
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 #1e51fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1e51fa-9ca1c4-df774e-221f2d-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