Color

#01ef4c

#01ef4c
hex#01ef4c
rgbrgb(1, 239, 76)
hslhsl(139, 99%, 47%)
oklchoklch(0.828 0.255 145.7)
Closest name: Becquerel (#4bec13)Relative luminance 0.6226

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#ef01a3

#2def01 · #01efc3

#4c01ef · #ef4c01

Split-complementary

Open in tool →

#c301ef · #ef012d

#012def · #ef01a3 · #efc301

Contrast

#01ef4c as textRatioAAAA largeAAAFix
Aaon white
1.56:1failfailfail
  • AA: use #01892c as the text (4.55:1)
  • AAA: use #016520 as the text (7.28:1)
  • AA: or shift the background to #575757 (4.63:1)
  • AAA: or shift the background to #3b3b3b (7.18:1)
Aaon black
13.45:1passpasspassPasses 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 #01ef4c 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 #01ef4c
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #01ef4c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/01ef4c-a2beae-c059d4-1f2d2a-ebf1e9?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