WhatsApp Green
WhatsApp Green (#25D366) is a true green with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (142°, 70%, 49%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary magenta. For something softer, pull in its analogous neighbors on either side of the wheel. The vivid green of the messaging app Meta acquired in 2014, now the dominant messaging tint of the mobile world. Inherited from the 2009 Apple Messages skin its founders built against — a callback that outlasted the platform that inspired it.