/* https://grabient.com/_gHjgJXgORgHYgHZgAkgDDgD6gIagMegIwgF8?style=linearGradient&steps=6&angle=315 */

background: linear-gradient(315deg, #9f29e2 0.000%, #ba3ce0 20.000%, #d158e1 40.000%, #e37be6 60.000%, #efa0ec 80.000%, #f3c5f1 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gHjgJXgORgHYgHZgAkgDDgD6gIagMegIwgF8?style=linearGradient&steps=6&angle=315 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.854" x2="0.146" y2="0.146">
        <stop offset="0.000" stop-color="#9f29e2" /><stop offset="0.200" stop-color="#ba3ce0" /><stop offset="0.400" stop-color="#d158e1" /><stop offset="0.600" stop-color="#e37be6" /><stop offset="0.800" stop-color="#efa0ec" /><stop offset="1.000" stop-color="#f3c5f1" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#9f29e2", "#ba3ce0", "#d158e1", "#e37be6", "#efa0ec", "#f3c5f1"]

// https://grabient.com/_gHjgJXgORgHYgHZgAkgDDgD6gIagMegIwgF8?style=linearGradient&steps=6&angle=315
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 6.0;
const float ANGLE = 315.0;

vec3 palette(float t) {
    vec3 a = vec3(0.483, 0.599, 0.913);
    vec3 b = vec3(0.472, 0.473, 0.036);
    vec3 c = vec3(0.195, 0.250, 0.538);
    vec3 d = vec3(0.798, 0.560, 0.380);
    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);
}

[
  [0.483, 0.599, 0.913],
  [0.472, 0.473, 0.036],
  [0.195, 0.250, 0.538],
  [0.798, 0.560, 0.380]
]

Gradient palette editor — #9f29e2 to #f3c5f1