Color

#42f6ff

#42f6ff
hex#42f6ff
rgbrgb(66, 246, 255)
hslhsl(183, 100%, 63%)
oklchoklch(0.89 0.139 200.1)
Closest name: Aggressive Aqua (#00fbff)Relative luminance 0.7429

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff4c42

#42ffaa · #4297ff

#ff42f6 · #f6ff42

Split-complementary

Open in tool →

#ff4297 · #ffaa42

#aa42ff · #ff4c42 · #97ff42

Contrast

#42f6ff as textRatioAAAA largeAAAFix
Aaon white
1.32:1failfailfail
  • AA: use #00838a as the text (4.55:1)
  • AAA: use #006166 as the text (7.24:1)
  • AA: or shift the background to #636363 (4.54:1)
  • AAA: or shift the background to #474747 (7.02:1)
Aaon black
15.86:1passpasspassPasses 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 #42f6ff 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

#42f6ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42f6ff
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 #42f6ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42f6ff-a2b9be-d4598e-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