/* https://grabient.com/_gLxgB3gL4gMagEngYqgBigDigBkgDNgBggKb?style=linearGradient&steps=6&angle=90 */

background: linear-gradient(90deg, #f95c00 0.000%, #e04e27 20.000%, #c73c56 40.000%, #ae2788 60.000%, #9612ba 80.000%, #7e00ed 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gLxgB3gL4gMagEngYqgBigDigBkgDNgBggKb?style=linearGradient&steps=6&angle=90 -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#f95c00" /><stop offset="0.200" stop-color="#e04e27" /><stop offset="0.400" stop-color="#c73c56" /><stop offset="0.600" stop-color="#ae2788" /><stop offset="0.800" stop-color="#9612ba" /><stop offset="1.000" stop-color="#7e00ed" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#f95c00", "#e04e27", "#c73c56", "#ae2788", "#9612ba", "#7e00ed"]

// https://grabient.com/_gLxgB3gL4gMagEngYqgBigDigBkgDNgBggKb?style=linearGradient&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(0.753, 0.119, 0.760);
    vec3 b = vec3(0.794, 0.295, 1.578);
    vec3 c = vec3(0.098, 0.226, 0.100);
    vec3 d = vec3(0.205, 0.096, 0.667);
    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);
}

[
  [0.753, 0.119, 0.760],
  [0.794, 0.295, 1.578],
  [0.098, 0.226, 0.100],
  [0.205, 0.096, 0.667]
]

Gradient palette editor — #f95c00 to #7e00ed