Color

#516bd2

#516bd2
hex#516bd2
rgbrgb(81, 107, 210)
hslhsl(228, 59%, 57%)
oklchoklch(0.561 0.161 269.9)
Closest name: God of Rain (#4466cc)Relative luminance 0.1692

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d2b851

#51abd2 · #7751d2

#d2516b · #6bd251

Split-complementary

Open in tool →

#d27751 · #abd251

#d251ab · #d2b851 · #51d277

Contrast

#516bd2 as textRatioAAAA largeAAAFix
Aaon white
4.79:1passpassfail
  • AAA: use #314dbf as the text (7.13:1)
Aaon black
4.38:1failpassfail
  • AA: use #556ed3 as the text (4.56:1)
  • AAA: use #8194df as the text (7.23:1)
  • AA: or shift the background to #fafafa (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516bd2 as the background.

Brands using this color

Fonts for this mood

#516bd2 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #516bd2
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 #516bd2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516bd2-9c9fc4-df7c4e-231f2d-e9eff1?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