Color

#0a1dcd

#0a1dcd
hex#0a1dcd
rgbrgb(10, 29, 205)
hslhsl(234, 91%, 42%)
oklchoklch(0.403 0.253 265.2)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0535

Colors that go with #0a1dcd

Charcoal, Crimson and Cornflower 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 →

#cdb90a

#0a7fcd · #580acd

#cd0a1d · #1dcd0a

Split-complementary

Open in tool →

#cd580a · #7fcd0a

#cd0a7f · #cdb90a · #0acd58

Contrast

#0a1dcd as textRatioAAAA largeAAAFix
Aaon white
10.14:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #5565f7 as the text (4.59:1)
  • AAA: use #808cf9 as the text (7.04:1)
  • AA: or shift the background to #adadad (4.52:1)
  • AAA: or shift the background to #d9d9d9 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a1dcd as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#0a1dcd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a1dcd
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 #0a1dcd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a1dcd-9d9cc4-df8a4e-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