Color

#00377a

#00377a
hex#00377a
rgbrgb(0, 55, 122)
hslhsl(213, 100%, 24%)
oklchoklch(0.35 0.126 257.3)
Closest name: Below the Surface (#0a2f7c)Relative luminance 0.0414

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7a4300

#00747a · #06007a

#7a0037 · #377a00

Split-complementary

Open in tool →

#7a0600 · #747a00

#7a0074 · #7a4300 · #007a06

Contrast

#00377a as textRatioAAAA largeAAAFix
Aaon white
11.49:1passpasspassPasses AAA — no fix needed.
Aaon black
1.83:1failfailfail
  • AA: use #006ef5 as the text (4.55:1)
  • AAA: use #4297ff as the text (7.1:1)
  • AA: or shift the background to #a3a3a3 (4.56:1)
  • AAA: or shift the background to #cccccc (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 #00377a 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

#00377a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #00377a
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 #00377a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/00377a-9ca9c4-df584e-1f202d-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