Color

#40acdd

#40acdd
hex#40acdd
rgbrgb(64, 172, 221)
hslhsl(199, 70%, 56%)
oklchoklch(0.704 0.12 231.9)
Closest name: Cousteau (#55a9d6)Relative luminance 0.3582

Colors that go with #40acdd

Charcoal, Peru and Midnight 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.

Real palettes that use #40acdd

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#dd7240

#40ddc1 · #405ddd

#dd40ac · #acdd40

Split-complementary

Open in tool →

#dd405d · #ddc140

#c140dd · #dd7240 · #5ddd40

Contrast

#40acdd as textRatioAAAA largeAAAFix
Aaon white
2.57:1failfailfail
  • AA: use #1e7da9 as the text (4.6:1)
  • AAA: use #165d7e as the text (7.24:1)
  • AA: or shift the background to #383838 (4.56:1)
  • AAA: or shift the background to #141414 (7.16:1)
Aaon black
8.16:1passpasspassPasses 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 #40acdd 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

#40acdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

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

tool url/palettes/new/40acdd-9cb3c4-df4e66-1f232d-e9f1f0?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