Color

#31b0bf

#31b0bf
hex#31b0bf
rgbrgb(49, 176, 191)
hslhsl(186, 59%, 47%)
oklchoklch(0.697 0.108 206.8)
Closest name: Aquarius (#2db0ce)Relative luminance 0.3547

Colors that go with #31b0bf

Charcoal, Tomato and Denim 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 →

#bf3f31

#31bf86 · #316abf

#bf31b0 · #b0bf31

Split-complementary

Open in tool →

#bf316a · #bf8631

#8631bf · #bf3f31 · #6abf31

Contrast

#31b0bf as textRatioAAAA largeAAAFix
Aaon white
2.59:1failfailfail
  • AA: use #24808a as the text (4.64:1)
  • AAA: use #1b6269 as the text (7.01:1)
  • AA: or shift the background to #383838 (4.52:1)
  • AAA: or shift the background to #141414 (7.1:1)
Aaon black
8.09:1passpasspassPasses 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 #31b0bf 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

#31b0bf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #31b0bf
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 #31b0bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/31b0bf-a2b8be-df4e86-1f262d-e9f1ee?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