Color

#4bbb1b

#4bbb1b
hex#4bbb1b
rgbrgb(75, 187, 27)
hslhsl(102, 75%, 42%)
oklchoklch(0.7 0.211 139)
Closest name: Frog (#58bc08)Relative luminance 0.3712

Colors that go with #4bbb1b

Charcoal, Royal 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 →

#8b1bbb

#9bbb1b · #1bbb3b

#1b4bbb · #bb1b4b

Split-complementary

Open in tool →

#3b1bbb · #bb1b9b

#1b9bbb · #8b1bbb · #bb3b1b

Contrast

#4bbb1b as textRatioAAAA largeAAAFix
Aaon white
2.49:1failfailfail
  • AA: use #368613 as the text (4.59:1)
  • AAA: use #27620e as the text (7.4:1)
  • AA: or shift the background to #383838 (4.7:1)
  • AAA: or shift the background to #171717 (7.19:1)
Aaon black
8.42:1passpasspassPasses 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 #4bbb1b 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 #4bbb1b
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 #4bbb1b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4bbb1b-a7bea2-6e4edf-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