/* https://grabient.com/_gIegHPgIUgGGgD1gEagJwgQKgKXgGogH3gNo?style=linearGradient&steps=7&angle=180 */

background: linear-gradient(180deg, #3238ba 0.000%, #285acf 16.667%, #479ac4 33.333%, #81b49c 50.000%, #bf8c6c 66.667%, #e84d48 83.333%, #e93941 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gIegHPgIUgGGgD1gEagJwgQKgKXgGogH3gNo?style=linearGradient&steps=7&angle=180 -->
            <defs>
              <linearGradient id="gradient" x1="0.500" y1="0.000" x2="0.500" y2="1.000">
        <stop offset="0.000" stop-color="#3238ba" /><stop offset="0.167" stop-color="#285acf" /><stop offset="0.333" stop-color="#479ac4" /><stop offset="0.500" stop-color="#81b49c" /><stop offset="0.667" stop-color="#bf8c6c" /><stop offset="0.833" stop-color="#e84d48" /><stop offset="1.000" stop-color="#e93941" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#3238ba", "#285acf", "#479ac4", "#81b49c", "#bf8c6c", "#e84d48", "#e93941"]

// https://grabient.com/_gIegHPgIUgGGgD1gEagJwgQKgKXgGogH3gNo?style=linearGradient&steps=7&angle=180
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 180.0;

vec3 palette(float t) {
    vec3 a = vec3(0.542, 0.463, 0.532);
    vec3 b = vec3(0.390, 0.245, 0.282);
    vec3 c = vec3(0.624, 1.034, 0.663);
    vec3 d = vec3(0.424, 0.503, 0.872);
    return a + b * cos(6.283185 * (c * t + d));
}

// N stops sampled from the palette, blended like the CSS gradient
vec3 stops(float t) {
    float n = STEPS - 1.0;
    float x = clamp(t, 0.0, 1.0) * n;
    return mix(palette(floor(x) / n), palette(min(floor(x) + 1.0, n) / n), fract(x));
}

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);
}

[
  [0.542, 0.463, 0.532],
  [0.390, 0.245, 0.282],
  [0.624, 1.034, 0.663],
  [0.424, 0.503, 0.872]
]

Gradient palette editor — #3238ba to #e93941