Color

#0739df

#0739df
hex#0739df
rgbrgb(7, 57, 223)
hslhsl(226, 94%, 45%)
oklchoklch(0.457 0.251 264.2)
Closest name: Brutally Blue (#0022dd)Relative luminance 0.083

Colors that go with #0739df

Charcoal, Crimson and Amber 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 →

#dfac07

#07a5df · #4007df

#df0739 · #39df07

Split-complementary

Open in tool →

#df4007 · #a5df07

#df07a5 · #dfac07 · #07df40

Contrast

#0739df as textRatioAAAA largeAAAFix
Aaon white
7.9:1passpasspassPasses AAA — no fix needed.
Aaon black
2.66:1failfailfail
  • AA: use #3e6af9 as the text (4.63:1)
  • AAA: use #7090fb as the text (7.07:1)
  • AA: or shift the background to #c4c4c4 (4.53:1)
  • AAA: or shift the background to #f2f2f2 (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 #0739df as the background.

Brands using this color

Fonts for this mood

#0739df reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0739df
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 #0739df and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0739df-9ca1c4-df774e-221f2d-e9eff1?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