Color

#0000cc

#0000cc
hex#0000cc
rgbrgb(0, 0, 204)
hslhsl(240, 100%, 40%)
oklchoklch(0.382 0.265 264.1)
Closest name: mediumblue (#0000cd)Relative luminance 0.0436

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cccc00

#0066cc · #6600cc

#cc0000 · #00cc00

Split-complementary

Open in tool →

#cc6600 · #66cc00

#cc0066 · #cccc00 · #00cc66

Contrast

#0000cc as textRatioAAAA largeAAAFix
Aaon white
11.22:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #6161ff as the text (4.66:1)
  • AAA: use #8a8aff as the text (7.16:1)
  • AA: or shift the background to #a6a6a6 (4.61:1)
  • AAA: or shift the background to #cfcfcf (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0000cc as the background.

Brands using this color

Fonts for this mood

#0000cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0000cc
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 #0000cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0000cc-a19cc4-df994e-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