Color

#40b7bf

#40b7bf
hex#40b7bf
rgbrgb(64, 183, 191)
hslhsl(184, 50%, 50%)
oklchoklch(0.717 0.104 201.5)
Closest name: Blue Bobbin (#52b4ca)Relative luminance 0.3872

Colors that go with #40b7bf

Charcoal, Denim and Dodger Blue 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 →

#bf4840

#40bf88 · #4077bf

#bf40b7 · #b7bf40

Split-complementary

Open in tool →

#bf4077 · #bf8840

#8840bf · #bf4840 · #77bf40

Contrast

#40b7bf as textRatioAAAA largeAAAFix
Aaon white
2.4:1failfailfail
  • AA: use #2d8086 as the text (4.62:1)
  • AAA: use #215f63 as the text (7.29:1)
  • AA: or shift the background to #3d3d3d (4.52:1)
  • AAA: or shift the background to #1c1c1c (7.1:1)
Aaon black
8.74:1passpasspassPasses 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 #40b7bf 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

#40b7bf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40b7bf
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 #40b7bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40b7bf-a2b9be-df4e8a-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