Color

#40bde2

#40bde2
hex#40bde2
rgbrgb(64, 189, 226)
hslhsl(194, 74%, 57%)
oklchoklch(0.746 0.119 221.8)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.4298

Colors that go with #40bde2

Charcoal, Denim 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e26640

#40e2b7 · #406be2

#e240bd · #bde240

Split-complementary

Open in tool →

#e2406b · #e2b740

#b740e2 · #e26640 · #6be240

Contrast

#40bde2 as textRatioAAAA largeAAAFix
Aaon white
2.19:1failfailfail
  • AA: use #1880a0 as the text (4.53:1)
  • AAA: use #126078 as the text (7.07:1)
  • AA: or shift the background to #424242 (4.59:1)
  • AAA: or shift the background to #242424 (7.09:1)
Aaon black
9.6:1passpasspassPasses 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 #40bde2 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

#40bde2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40bde2
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 #40bde2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40bde2-9cb6c4-df4e72-1f242d-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