brandsweets

Color

#516181

#516181
hex#516181
rgbrgb(81, 97, 129)
hslhsl(220, 23%, 41%)
oklchoklch(0.492 0.055 263.9)
Closest name: Admiral Blue (#50647f)Relative luminance 0.1188
CoolMuted
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
516181817151

#817151

Analogous

Open in tool →
516181517981595181

#517981 · #595181

Triadic

Open in tool →
516181815161618151

#815161 · #618151

Split-complementary

Open in tool →
516181815951798151

#815951 · #798151

Tetradic

Open in tool →
516181815179817151518159

#815179 · #817151 · #518159

Contrast

#516181 as textRatioAAAA largeAAAFix
Aaon white
6.22:1passpassfail
  • AAA: use #4b5977 as the text (7.01:1)
Aaon black
3.38:1failpassfail
  • AA: use #62769d as the text (4.6:1)
  • AAA: use #8897b4 as the text (7.13:1)
  • AA: or shift the background to #dedede (4.62:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516181 as the background.

Brands using this color

mcpConnect your agent — build around #516181
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 #516181 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516181-9ca5c4-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