Color

#001f5b

#001f5b
hex#001f5b
rgbrgb(0, 31, 91)
hslhsl(220, 100%, 18%)
oklchoklch(0.265 0.114 260.9)
Closest name: Black Sea Night (#052462)Relative luminance 0.0174

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c3d00

#004d5c · #0f005c

#5c001f · #1f5c00

Split-complementary

Open in tool →

#5c0f00 · #4d5c00

#5c004c · #5c3d00 · #005c0f

Contrast

#001f5b as textRatioAAAA largeAAAFix
Aaon white
15.59:1passpasspassPasses AAA — no fix needed.
Aaon black
1.35:1failfailfail
  • AA: use #1f69ff as the text (4.52:1)
  • AAA: use #5c92ff as the text (7.01:1)
  • AA: or shift the background to #8a8a8a (4.52:1)
  • AAA: or shift the background to #b0b0b0 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #001f5b 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

#001f5b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #001f5b
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 #001f5b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/001f5b-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