Color

#0a4ecd

#0a4ecd
hex#0a4ecd
rgbrgb(10, 78, 205)
hslhsl(219, 91%, 42%)
oklchoklch(0.474 0.206 261.9)
Closest name: Denim (#1560bd)Relative luminance 0.0992

Colors that go with #0a4ecd

Charcoal, Crimson and Steel 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 →

#cd880a

#0aafcd · #270acd

#cd0a4e · #4ecd0a

Split-complementary

Open in tool →

#cd270a · #afcd0a

#cd0aaf · #cd880a · #0acd27

Contrast

#0a4ecd as textRatioAAAA largeAAAFix
Aaon white
7.04:1passpasspassPasses AAA — no fix needed.
Aaon black
2.98:1failfailfail
  • AA: use #246df5 as the text (4.58:1)
  • AAA: use #5e94f7 as the text (7.05:1)
  • AA: or shift the background to #cfcfcf (4.52:1)
  • AAA: or shift the background to #ffffff (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a4ecd as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0a4ecd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a4ecd
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 #0a4ecd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a4ecd-9ca5c4-df664e-211f2d-e9f0f1?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