Color

#40b0ba

#40b0ba
hex#40b0ba
rgbrgb(64, 176, 186)
hslhsl(185, 49%, 49%)
oklchoklch(0.699 0.1 203.6)
Closest name: Blue Bobbin (#52b4ca)Relative luminance 0.3569

Colors that go with #40b0ba

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 →

#ba4a40

#40ba87 · #4073ba

#ba40b0 · #b0ba40

Split-complementary

Open in tool →

#ba4073 · #ba8740

#8740ba · #ba4a40 · #73ba40

Contrast

#40b0ba as textRatioAAAA largeAAAFix
Aaon white
2.58:1failfailfail
  • AA: use #2f8189 as the text (4.54:1)
  • AAA: use #236167 as the text (7.05:1)
  • AA: or shift the background to #383838 (4.54:1)
  • AAA: or shift the background to #141414 (7.14:1)
Aaon black
8.14:1passpasspassPasses 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 #40b0ba 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

#40b0ba reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40b0ba
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 #40b0ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40b0ba-a2b8be-df4e88-1f262d-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