Color

#0518eb

#0518eb
hex#0518eb
rgbrgb(5, 24, 235)
hslhsl(235, 96%, 47%)
oklchoklch(0.436 0.287 264.6)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0668

Colors that go with #0518eb

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 →

#ebd805

#058beb · #6505eb

#eb0518 · #18eb05

Split-complementary

Open in tool →

#eb6505 · #8beb05

#eb058b · #ebd805 · #05eb65

Contrast

#0518eb as textRatioAAAA largeAAAFix
Aaon white
8.99:1passpasspassPasses AAA — no fix needed.
Aaon black
2.34:1failfailfail
  • AA: use #5563fc as the text (4.58:1)
  • AAA: use #828cfc as the text (7.11:1)
  • AA: or shift the background to #b8b8b8 (4.53:1)
  • AAA: or shift the background to #e3e3e3 (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0518eb as the background.

Brands using this color

Fonts for this mood

#0518eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0518eb
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 #0518eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0518eb-9e9cc4-df8d4e-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