brandsweets

Color

#516581

#516581
hex#516581
rgbrgb(81, 101, 129)
hslhsl(215, 23%, 41%)
oklchoklch(0.502 0.051 256.8)
Closest name: Admiral Blue (#50647f)Relative luminance 0.1264
CoolMuted
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
516581816d51

#816d51

Analogous

Open in tool →
516581517d81555181

#517d81 · #555181

Triadic

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516581815165658151

#815165 · #658151

Split-complementary

Open in tool →
5165818155517d8151

#815551 · #7d8151

Tetradic

Open in tool →
51658181517d816d51518155

#81517d · #816d51 · #518155

Contrast

#516581 as textRatioAAAA largeAAAFix
Aaon white
5.95:1passpassfail
  • AAA: use #475871 as the text (7.24:1)
Aaon black
3.53:1failpassfail
  • AA: use #5e7697 as the text (4.51:1)
  • AAA: use #8598b2 as the text (7.13:1)
  • AA: or shift the background to #e0e0e0 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516581 as the background.

Brands using this color

mcpConnect your agent — build around #516581
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 #516581 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516581-9ca8c4-df5d4e-201f2d-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