Color

#42fcff

#42fcff
hex#42fcff
rgbrgb(66, 252, 255)
hslhsl(181, 100%, 63%)
oklchoklch(0.904 0.142 196.6)
Closest name: Aggressive Aqua (#00fbff)Relative luminance 0.78

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff4542

#42ffa4 · #429eff

#ff42fc · #fcff42

Split-complementary

Open in tool →

#ff429e · #ffa442

#a442ff · #ff4542 · #9eff42

Contrast

#42fcff as textRatioAAAA largeAAAFix
Aaon white
1.27:1failfailfail
  • AA: use #008285 as the text (4.63:1)
  • AAA: use #005f61 as the text (7.47:1)
  • AA: or shift the background to #666666 (4.54:1)
  • AAA: or shift the background to #4a4a4a (7.01:1)
Aaon black
16.6:1passpasspassPasses 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 #42fcff 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

#42fcff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42fcff
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #42fcff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42fcff-a2babe-d45992-1f272d-e9f1ed?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