Color

#5166d2

#5166d2
hex#5166d2
rgbrgb(81, 102, 210)
hslhsl(230, 59%, 57%)
oklchoklch(0.551 0.167 271.6)
Closest name: God of Rain (#4466cc)Relative luminance 0.1591

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d2bc51

#51a7d2 · #7c51d2

#d25166 · #66d251

Split-complementary

Open in tool →

#d27c51 · #a7d251

#d251a7 · #d2bc51 · #51d27c

Contrast

#5166d2 as textRatioAAAA largeAAAFix
Aaon white
5.02:1passpassfail
Aaon black
4.18:1failpassfail
  • AA: use #596dd4 as the text (4.56:1)
  • AAA: use #8191df as the text (7.05:1)
  • AA: or shift the background to #f5f5f5 (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5166d2 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

#5166d2 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5166d2
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 #5166d2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5166d2-9c9ec4-df814e-231f2d-e9eef1?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