Color

#31bbdd

#31bbdd
hex#31bbdd
rgbrgb(49, 187, 221)
hslhsl(192, 72%, 53%)
oklchoklch(0.735 0.122 218.9)
Closest name: Blue Martini (#52b4d3)Relative luminance 0.4141

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dd5331

#31ddaa · #3165dd

#dd31bb · #bbdd31

Split-complementary

Open in tool →

#dd3165 · #ddaa31

#aa31dd · #dd5331 · #65dd31

Contrast

#31bbdd as textRatioAAAA largeAAAFix
Aaon white
2.26:1failfailfail
  • AA: use #19809a as the text (4.57:1)
  • AAA: use #135f72 as the text (7.22:1)
  • AA: or shift the background to #404040 (4.58:1)
  • AAA: or shift the background to #212121 (7.12:1)
Aaon black
9.28:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #31bbdd 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

#31bbdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #31bbdd
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 #31bbdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/31bbdd-a2b5be-df4e77-1f242d-e9f1ef?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