Color

#3dc318

#3dc318
hex#3dc318
rgbrgb(61, 195, 24)
hslhsl(107, 78%, 43%)
oklchoklch(0.717 0.226 140.5)
Closest name: Crude Banana (#21c40e)Relative luminance 0.4009

Colors that go with #3dc318

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 →

#9e18c3

#93c318 · #18c349

#183dc3 · #c3183d

Split-complementary

Open in tool →

#4918c3 · #c31893

#1893c3 · #9e18c3 · #c34918

Contrast

#3dc318 as textRatioAAAA largeAAAFix
Aaon white
2.33:1failfailfail
  • AA: use #2b8811 as the text (4.53:1)
  • AAA: use #1f640c as the text (7.28:1)
  • AA: or shift the background to #3d3d3d (4.66:1)
  • AAA: or shift the background to #1f1f1f (7.08:1)
Aaon black
9.02:1passpasspassPasses 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 #3dc318 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 #3dc318
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 #3dc318 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3dc318-a5bea2-7a4edf-1f2d22-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