red

Red (#FF0000) is pure, maximum-intensity red in the CSS named colour set and web colour standard, defined as the full red channel of the RGB model with zero green or blue. One of the three primary colours of light, it is simultaneously the colour of danger, passion, love, revolution, and vitality across cultures worldwide. In digital design, pure #FF0000 is rarely used directly as its extreme intensity causes halation on screens, but it anchors the entire warm colour spectrum.

Pure red is the color of adrenaline, passion, and urgency. It raises heart rate and stimulates appetite, which is why fast-food chains and sale banners rely on it worldwide. Culturally, red signifies luck and prosperity in East Asia while representing danger and prohibition in Western road signage.

Medium red is ideal for call-to-action buttons, sale badges, and notification dots where instant attention is needed. It should be used sparingly as an accent rather than a dominant background to avoid visual fatigue. Red pairs effectively with white text for maximum legibility in buttons and banners.