/* https://grabient.com/_gIUgJegAAgWCgMEgAAgBkgDagBggDLgJLgAA?style=linearSwatches&steps=6&angle=90 */ background: linear-gradient(90deg, #f00000 0.000%, #f00000 16.667%, #c41400 calc(16.667% + 1px), #c41400 33.333%, #974000 calc(33.333% + 1px), #974000 50.000%, #6a7300 calc(50.000% + 1px), #6a7300 66.667%, #3ea900 calc(66.667% + 1px), #3ea900 83.333%, #12dd00 calc(83.333% + 1px) 100.000%);

// https://grabient.com/_gIUgJegAAgWCgMEgAAgBkgDagBggDLgJLgAA?style=linearSwatches&steps=6&angle=90 // cosine gradient palette — https://iquilezles.org/articles/palettes/ const float STEPS = 6.0; const float ANGLE = 90.0; vec3 palette(float t) { vec3 a = vec3(0.532, 0.606, 0.000); vec3 b = vec3(1.410, 0.772, 0.000); vec3 c = vec3(0.100, 0.218, 0.096); vec3 d = vec3(0.203, 0.587, 0.000); return a + b * cos(6.283185 * (c * t + d)); } // N hard swatches sampled from the palette vec3 stops(float t) { float i = min(floor(clamp(t, 0.0, 1.0) * STEPS), STEPS - 1.0); return palette(i / (STEPS - 1.0)); } void mainImage(out vec4 fragColor, in vec2 fragCoord) { vec2 p = fragCoord - 0.5 * iResolution.xy; // CSS angle: 0 = up, clockwise; span = CSS gradient-line length vec2 dir = vec2(sin(radians(ANGLE)), cos(radians(ANGLE))); float len = abs(iResolution.x * dir.x) + abs(iResolution.y * dir.y); float t = dot(p, dir) / len + 0.5; fragColor = vec4(stops(t), 1.0); }

Gradient palette editor — #f00000 to #12dd00