Color

#003099

#003099
hex#003099
rgbrgb(0, 48, 153)
hslhsl(221, 100%, 30%)
oklchoklch(0.365 0.177 262.6)
Closest name: Deepsea Kraken (#082599)Relative luminance 0.0441

Tints & shades

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

Harmonies

Complementary

Open in tool →

#996900

#007d99 · #1c0099

#990030 · #309900

Split-complementary

Open in tool →

#991c00 · #7d9900

#99007d · #996900 · #00991c

Contrast

#003099 as textRatioAAAA largeAAAFix
Aaon white
11.15:1passpasspassPasses AAA — no fix needed.
Aaon black
1.88:1failfailfail
  • AA: use #2469ff as the text (4.54:1)
  • AAA: use #6193ff as the text (7.13:1)
  • AA: or shift the background to #a6a6a6 (4.58:1)
  • AAA: or shift the background to #cfcfcf (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #003099 as the background.

Brands using this color

Fonts for this mood

#003099 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #003099
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 #003099 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/003099-9ca4c4-df6b4e-211f2d-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