Color

#42d7b2

#42d7b2
hex#42d7b2
rgbrgb(66, 215, 178)
hslhsl(165, 65%, 55%)
oklchoklch(0.792 0.135 172.5)
Closest name: mediumaquamarine (#66cdaa)Relative luminance 0.5297

Colors that go with #42d7b2

Charcoal, Blue and Crimson 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 →

#d74267

#42d767 · #42b2d7

#b242d7 · #d7b242

Split-complementary

Open in tool →

#d742b2 · #d76742

#6742d7 · #d74267 · #b2d742

Contrast

#42d7b2 as textRatioAAAA largeAAAFix
Aaon white
1.81:1failfailfail
  • AA: use #1c8269 as the text (4.72:1)
  • AAA: use #15614e as the text (7.36:1)
  • AA: or shift the background to #4f4f4f (4.52:1)
  • AAA: or shift the background to #303030 (7.29:1)
Aaon black
11.59:1passpasspassPasses 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 #42d7b2 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 #42d7b2
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 #42d7b2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42d7b2-a2beba-d459b3-1f2b2d-e9f1eb?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