Color

#2359fb

#2359fb
hex#2359fb
rgbrgb(35, 89, 251)
hslhsl(225, 96%, 56%)
oklchoklch(0.541 0.247 264.7)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1447

Colors that go with #2359fb

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 →

#fbc523

#23c5fb · #5923fb

#fb2359 · #59fb23

Split-complementary

Open in tool →

#fb5923 · #c5fb23

#fb23c5 · #fbc523 · #23fb59

Contrast

#2359fb as textRatioAAAA largeAAAFix
Aaon white
5.39:1passpassfail
Aaon black
3.89:1failpassfail
  • AA: use #3768fb as the text (4.54:1)
  • AAA: use #6e92fc as the text (7.18:1)
  • AA: or shift the background to #ebebeb (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 #2359fb as the background.

Brands using this color

Fonts for this mood

#2359fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2359fb
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 #2359fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2359fb-9ca1c4-df754e-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