Color

#03369b

#03369b
hex#03369b
rgbrgb(3, 54, 155)
hslhsl(220, 96%, 31%)
oklchoklch(0.379 0.172 262.2)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0502

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9b6803

#03829b · #1c039b

#9b0336 · #369b03

Split-complementary

Open in tool →

#9b1c03 · #829b03

#9b0382 · #9b6803 · #039b1c

Contrast

#03369b as textRatioAAAA largeAAAFix
Aaon white
10.47:1passpasspassPasses AAA — no fix needed.
Aaon black
2:1failfailfail
  • AA: use #236bfb as the text (4.57:1)
  • AAA: use #5f93fc as the text (7.07:1)
  • AA: or shift the background to #ababab (4.56:1)
  • AAA: or shift the background to #d4d4d4 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03369b 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

#03369b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03369b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #03369b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03369b-9ca5c4-df694e-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