Color

#4bc318

#4bc318
hex#4bc318
rgbrgb(75, 195, 24)
hslhsl(102, 78%, 43%)
oklchoklch(0.721 0.221 139.2)
Closest name: Frog (#58bc08)Relative luminance 0.4059

Colors that go with #4bc318

Blue, Charcoal and Royal Blue 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 →

#9018c3

#a1c318 · #18c33a

#184bc3 · #c3184b

Split-complementary

Open in tool →

#3a18c3 · #c318a1

#18a1c3 · #9018c3 · #c33a18

Contrast

#4bc318 as textRatioAAAA largeAAAFix
Aaon white
2.3:1failfailfail
  • AA: use #338410 as the text (4.72:1)
  • AAA: use #27640c as the text (7.21:1)
  • AA: or shift the background to #404040 (4.5:1)
  • AAA: or shift the background to #1f1f1f (7.16:1)
Aaon black
9.12:1passpasspassPasses 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 #4bc318 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 #4bc318
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 #4bc318 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4bc318-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