Color

#1fc601

#1fc601
hex#1fc601
rgbrgb(31, 198, 1)
hslhsl(111, 99%, 39%)
oklchoklch(0.719 0.24 141.8)
Closest name: Crude Banana (#21c40e)Relative luminance 0.4068

Colors that go with #1fc601

Blue, 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 →

#a801c6

#81c601 · #01c646

#011fc6 · #c6011f

Split-complementary

Open in tool →

#4601c6 · #c60181

#0181c6 · #a801c6 · #c64601

Contrast

#1fc601 as textRatioAAAA largeAAAFix
Aaon white
2.3:1failfailfail
  • AA: use #158901 as the text (4.55:1)
  • AAA: use #106501 as the text (7.28:1)
  • AA: or shift the background to #404040 (4.51:1)
  • AAA: or shift the background to #212121 (7.01:1)
Aaon black
9.14:1passpasspassPasses 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 #1fc601 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 #1fc601
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 #1fc601 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1fc601-a3bea2-834edf-1f2d23-eef1e9?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