Color

#42be09

#42be09
hex#42be09
rgbrgb(66, 190, 9)
hslhsl(101, 91%, 39%)
oklchoklch(0.704 0.222 139.5)
Closest name: Frog (#58bc08)Relative luminance 0.38

Colors that go with #42be09

Taupe, Orchid and Hot Pink 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 →

#8509be

#9dbe09 · #09be2a

#0942be · #be0942

Split-complementary

Open in tool →

#2a09be · #be099d

#099dbe · #8509be · #be2a09

Contrast

#42be09 as textRatioAAAA largeAAAFix
Aaon white
2.44:1failfailfail
  • AA: use #308806 as the text (4.52:1)
  • AAA: use #246605 as the text (7.05:1)
  • AA: or shift the background to #3b3b3b (4.59:1)
  • AAA: or shift the background to #1a1a1a (7.13:1)
Aaon black
8.6:1passpasspassPasses 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 #42be09 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 #42be09
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 #42be09 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42be09-a7bea2-6b4edf-1f2d21-eff1e9?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