Color

#3fbae4

#3fbae4
hex#3fbae4
rgbrgb(63, 186, 228)
hslhsl(195, 75%, 57%)
oklchoklch(0.739 0.121 225.2)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.4178

Colors that go with #3fbae4

Charcoal, Amber and Dark Orange 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 →

#e4683f

#3fe4ba · #3f68e4

#e43fba · #bae43f

Split-complementary

Open in tool →

#e43f68 · #e4ba3f

#ba3fe4 · #e4683f · #68e43f

Contrast

#3fbae4 as textRatioAAAA largeAAAFix
Aaon white
2.24:1failfailfail
  • AA: use #177ea1 as the text (4.63:1)
  • AAA: use #115f78 as the text (7.16:1)
  • AA: or shift the background to #404040 (4.62:1)
  • AAA: or shift the background to #212121 (7.17:1)
Aaon black
9.36:1passpasspassPasses 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 #3fbae4 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

#3fbae4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3fbae4
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 #3fbae4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fbae4-9cb5c4-df4e70-1f242d-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