Color

#00515c

#00515c
hex#00515c
rgbrgb(0, 81, 92)
hslhsl(187, 100%, 18%)
oklchoklch(0.399 0.069 210.4)
Closest name: Raging Thunderstorm (#004f63)Relative luminance 0.0666

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c0b00

#005c39 · #00235c

#5c0051 · #515c00

Split-complementary

Open in tool →

#5c0023 · #5c3900

#39005c · #5c0b00 · #235c00

Contrast

#00515c as textRatioAAAA largeAAAFix
Aaon white
9.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.33:1failfailfail
  • AA: use #008394 as the text (4.67:1)
  • AAA: use #00a7bd as the text (7.26:1)
  • AA: or shift the background to #b8b8b8 (4.54:1)
  • AAA: or shift the background to #e3e3e3 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #00515c 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

#00515c reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #00515c
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 #00515c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/00515c-a2b8be-df4e83-1f262d-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