Color

#31b4b4

#31b4b4
hex#31b4b4
rgbrgb(49, 180, 180)
hslhsl(180, 57%, 45%)
oklchoklch(0.703 0.109 195)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3659

Colors that go with #31b4b4

Charcoal, Denim and Dodger Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b43131

#31b473 · #3173b4

#b431b4 · #b4b431

Split-complementary

Open in tool →

#b43173 · #b47331

#7331b4 · #b43131 · #73b431

Contrast

#31b4b4 as textRatioAAAA largeAAAFix
Aaon white
2.52:1failfailfail
  • AA: use #238080 as the text (4.7:1)
  • AAA: use #1a6060 as the text (7.28:1)
  • AA: or shift the background to #383838 (4.64:1)
  • AAA: or shift the background to #171717 (7.1:1)
Aaon black
8.32:1passpasspassPasses 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 #31b4b4 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

#31b4b4 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #31b4b4
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

›analyze #31b4b4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/31b4b4-a2bbbe-d45994-1f272d-e9f1ed?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