brandsweets

Color

#3fee59

#3fee59
hex#3fee59
rgbrgb(63, 238, 89)
hslhsl(129, 84%, 59%)
oklchoklch(0.833 0.237 145.1)
Closest name: Becquerel (#4bec13)Relative luminance 0.6293
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
3fee59ee3fd4

#ee3fd4

Analogous

Open in tool →
3fee597cee3f3feeb1

#7cee3f · #3feeb1

Triadic

Open in tool →
3fee59593feeee593f

#593fee · #ee593f

Split-complementary

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3fee59b13feeee3f7c

#b13fee · #ee3f7c

Tetradic

Open in tool →
3fee593f7ceeee3fd4eeb13f

#3f7cee · #ee3fd4 · #eeb13f

Contrast

#3fee59 as textRatioAAAA largeAAAFix
Aaon white
1.55:1failfailfail
  • AA: use #0c881e as the text (4.61:1)
  • AAA: use #096717 as the text (7.08:1)
  • AA: or shift the background to #595959 (4.53:1)
  • AAA: or shift the background to #3d3d3d (7.03:1)
Aaon black
13.59:1passpasspassPasses 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 #3fee59 as the background.

Brands using this color

mcpConnect your agent — build around #3fee59
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 #3fee59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fee59-a2bea9-ae4edf-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