Color

#3fd4ee

#3fd4ee
hex#3fd4ee
rgbrgb(63, 212, 238)
hslhsl(189, 84%, 59%)
oklchoklch(0.804 0.126 212.1)
Closest name: mediumturquoise (#48d1cc)Relative luminance 0.5432

Colors that go with #3fd4ee

Charcoal, Dodger Blue and Taupe 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 →

#ee593f

#3feeb1 · #3f7cee

#ee3fd4 · #d4ee3f

Split-complementary

Open in tool →

#ee3f7c · #eeb13f

#b13fee · #ee593f · #7cee3f

Contrast

#3fd4ee as textRatioAAAA largeAAAFix
Aaon white
1.77:1failfailfail
  • AA: use #0d8296 as the text (4.52:1)
  • AAA: use #0a6171 as the text (7.09:1)
  • AA: or shift the background to #4f4f4f (4.63:1)
  • AAA: or shift the background to #333333 (7.14:1)
Aaon black
11.86:1passpasspassPasses 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 #3fd4ee as the background.

Brands using this color

Fonts for this mood

#3fd4ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3fd4ee
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 #3fd4ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fd4ee-a2b7be-df4e7e-1f252d-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