Color

#4fb9cf

#4fb9cf
hex#4fb9cf
rgbrgb(79, 185, 207)
hslhsl(190, 57%, 56%)
oklchoklch(0.733 0.101 213.6)
Closest name: Blue Bobbin (#52b4ca)Relative luminance 0.4087

Colors that go with #4fb9cf

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 →

#cf644f

#4fcfa4 · #4f79cf

#cf4fb9 · #b9cf4f

Split-complementary

Open in tool →

#cf4f79 · #cfa44f

#a44fcf · #cf644f · #79cf4f

Contrast

#4fb9cf as textRatioAAAA largeAAAFix
Aaon white
2.29:1failfailfail
  • AA: use #277f90 as the text (4.64:1)
  • AAA: use #1e5f6c as the text (7.22:1)
  • AA: or shift the background to #404040 (4.53:1)
  • AAA: or shift the background to #212121 (7.03:1)
Aaon black
9.17:1passpasspassPasses 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 #4fb9cf 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

#4fb9cf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4fb9cf
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 #4fb9cf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4fb9cf-a2b6be-df4e7c-1f252d-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