Color

#03e221

#03e221
hex#03e221
rgbrgb(3, 226, 33)
hslhsl(128, 97%, 45%)
oklchoklch(0.792 0.263 143.2)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5452

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e203c4

#55e203 · #03e290

#2103e2 · #e22103

Split-complementary

Open in tool →

#9003e2 · #e20355

#0355e2 · #e203c4 · #e29003

Contrast

#03e221 as textRatioAAAA largeAAAFix
Aaon white
1.76:1failfailfail
  • AA: use #028814 as the text (4.63:1)
  • AAA: use #02640f as the text (7.41:1)
  • AA: or shift the background to #4f4f4f (4.64:1)
  • AAA: or shift the background to #333333 (7.16:1)
Aaon black
11.9:1passpasspassPasses 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 #03e221 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 #03e221
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 #03e221 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03e221-a2bea9-ac4edf-1f2d27-ecf1e9?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