Color

#42f5ec

#42f5ec
hex#42f5ec
rgbrgb(66, 245, 236)
hslhsl(177, 90%, 61%)
oklchoklch(0.882 0.139 189.8)
Closest name: Arctic Water (#00fcfc)Relative luminance 0.7252

Colors that go with #42f5ec

Charcoal, Deep Sky Blue and Taupe 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 →

#f5424b

#42f593 · #42a5f5

#ec42f5 · #f5ec42

Split-complementary

Open in tool →

#f542a5 · #f59342

#9342f5 · #f5424b · #a5f542

Contrast

#42f5ec as textRatioAAAA largeAAAFix
Aaon white
1.35:1failfailfail
  • AA: use #07837d as the text (4.61:1)
  • AAA: use #05615c as the text (7.31:1)
  • AA: or shift the background to #616161 (4.57:1)
  • AAA: or shift the background to #454545 (7.08:1)
Aaon black
15.5:1passpasspassPasses 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 #42f5ec as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #42f5ec
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 #42f5ec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42f5ec-a2bcbe-d4599b-1f282d-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