Color

#001f66

#001f66
hex#001f66
rgbrgb(0, 31, 102)
hslhsl(222, 100%, 20%)
oklchoklch(0.277 0.13 262.2)
Closest name: Black Sea Night (#052462)Relative luminance 0.0194

Tints & shades

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

Harmonies

Complementary

Open in tool →

#664700

#005266 · #140066

#66001f · #1f6600

Split-complementary

Open in tool →

#661400 · #526600

#660052 · #664700 · #006614

Contrast

#001f66 as textRatioAAAA largeAAAFix
Aaon white
15.13:1passpasspassPasses AAA — no fix needed.
Aaon black
1.39:1failfailfail
  • AA: use #2969ff as the text (4.56:1)
  • AAA: use #6694ff as the text (7.24:1)
  • AA: or shift the background to #8f8f8f (4.68:1)
  • AAA: or shift the background to #b3b3b3 (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #001f66 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

#001f66 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #001f66
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 #001f66 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/001f66-9ca3c4-df6e4e-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