Color

#3bbfbf

#3bbfbf
hex#3bbfbf
rgbrgb(59, 191, 191)
hslhsl(180, 53%, 49%)
oklchoklch(0.736 0.111 195)
Closest name: Emerald Bliss (#4cbdac)Relative luminance 0.4195

Colors that go with #3bbfbf

Charcoal, Blue and Crimson 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 →

#bf3b3b

#3bbf7d · #3b7dbf

#bf3bbf · #bfbf3b

Split-complementary

Open in tool →

#bf3b7d · #bf7d3b

#7d3bbf · #bf3b3b · #7dbf3b

Contrast

#3bbfbf as textRatioAAAA largeAAAFix
Aaon white
2.24:1failfailfail
  • AA: use #288181 as the text (4.62:1)
  • AAA: use #1e6262 as the text (7.05:1)
  • AA: or shift the background to #404040 (4.64:1)
  • AAA: or shift the background to #212121 (7.2:1)
Aaon black
9.39:1passpasspassPasses 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 #3bbfbf as the background.

Brands using this color

Fonts for this mood

#3bbfbf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3bbfbf
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 #3bbfbf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bbfbf-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