Color

#004b57

#004b57
hex#004b57
rgbrgb(0, 75, 87)
hslhsl(188, 100%, 17%)
oklchoklch(0.379 0.066 212.9)
Closest name: Raging Thunderstorm (#004f63)Relative luminance 0.0572

Tints & shades

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

Harmonies

Complementary

Open in tool →

#570c00

#005737 · #002057

#57004b · #4b5700

Split-complementary

Open in tool →

#570020 · #573700

#370057 · #570c00 · #205700

Contrast

#004b57 as textRatioAAAA largeAAAFix
Aaon white
9.79:1passpasspassPasses AAA — no fix needed.
Aaon black
2.14:1failfailfail
  • AA: use #008094 as the text (4.52:1)
  • AAA: use #00a4bd as the text (7.05:1)
  • AA: or shift the background to #b0b0b0 (4.52:1)
  • AAA: or shift the background to #dbdbdb (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #004b57 as the background.

Brands using this color

Fonts for this mood

#004b57 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #004b57
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 #004b57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/004b57-a2b7be-df4e81-1f252d-e9f1ee?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