brandsweets

Color

#3fc651

#3fc651
hex#3fc651
rgbrgb(63, 198, 81)
hslhsl(128, 54%, 51%)
oklchoklch(0.729 0.196 145.3)
Closest name: Battletoad (#11cc55)Relative luminance 0.4204
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
3fc651c63fb4

#c63fb4

Analogous

Open in tool →
3fc65170c63f3fc694

#70c63f · #3fc694

Triadic

Open in tool →
3fc651513fc6c6513f

#513fc6 · #c6513f

Split-complementary

Open in tool →
3fc651943fc6c63f70

#943fc6 · #c63f70

Tetradic

Open in tool →
3fc6513f70c6c63fb4c6943f

#3f70c6 · #c63fb4 · #c6943f

Contrast

#3fc651 as textRatioAAAA largeAAAFix
Aaon white
2.23:1failfailfail
  • AA: use #288634 as the text (4.62:1)
  • AAA: use #1e6628 as the text (7.03:1)
  • AA: or shift the background to #424242 (4.5:1)
  • AAA: or shift the background to #212121 (7.21:1)
Aaon black
9.41:1passpasspassPasses 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 #3fc651 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #3fc651
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 #3fc651 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fc651-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