brandsweets

Color

#0a15eb

#0a15eb
hex#0a15eb
rgbrgb(10, 21, 235)
hslhsl(237, 92%, 48%)
oklchoklch(0.435 0.287 264.9)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.066
CoolVividTechnicalModern
Open in palette toolCheck contrastWhat goes with it ↓

Colors that go with #0a15eb

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.

Real palettes that use #0a15eb

Activision· brandAlaska Airlines· brandBBC· brandBinance· brand

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →
0a15ebebe00a

#ebe00a

Analogous

Open in tool →
0a15eb0a86eb6f0aeb

#0a86eb · #6f0aeb

Triadic

Open in tool →
0a15ebeb0a1515eb0a

#eb0a15 · #15eb0a

Split-complementary

Open in tool →
0a15ebeb6f0a86eb0a

#eb6f0a · #86eb0a

Tetradic

Open in tool →
0a15ebeb0a86ebe00a0aeb6f

#eb0a86 · #ebe00a · #0aeb6f

Contrast

#0a15eb as textRatioAAAA largeAAAFix
Aaon white
9.05:1passpasspassPasses AAA — no fix needed.
Aaon black
2.32:1failfailfail
  • AA: use #5d65f8 as the text (4.68:1)
  • AAA: use #858afa as the text (7.01:1)
  • AA: or shift the background to #b8b8b8 (4.56:1)
  • AAA: or shift the background to #e3e3e3 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a15eb as the background.

Brands using this color

Fonts for this mood

#0a15eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →
mcpConnect your agent — build around #0a15eb
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 #0a15eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a15eb-9f9cc4-df924e-251f2d-e9edf1?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