Color

#030ad3

#030ad3
hex#030ad3
rgbrgb(3, 10, 211)
hslhsl(238, 97%, 42%)
oklchoklch(0.397 0.268 264.4)
Closest name: mediumblue (#0000cd)Relative luminance 0.0494

Colors that go with #030ad3

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 →

#d3cc03

#0372d3 · #6403d3

#d3030a · #0ad303

Split-complementary

Open in tool →

#d36403 · #72d303

#d30372 · #d3cc03 · #03d364

Contrast

#030ad3 as textRatioAAAA largeAAAFix
Aaon white
10.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.99:1failfailfail
  • AA: use #5e64fd as the text (4.72:1)
  • AAA: use #868afd as the text (7.07:1)
  • AA: or shift the background to #ababab (4.6:1)
  • AAA: or shift the background to #d4d4d4 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #030ad3 as the background.

Brands using this color

Fonts for this mood

#030ad3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #030ad3
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 #030ad3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/030ad3-9f9cc4-df944e-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