/* https://grabient.com/_gNxgN_e6NgCCgDbhV_gJigHbgBigBggCqgPF?style=linearGradient&steps=6&angle=315 */

background: linear-gradient(315deg, #fcffe6 0.000%, #e7dfff 20.000%, #cfc1ff 40.000%, #c0aff9 60.000%, #c4afd4 80.000%, #d8c29c 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gNxgN_e6NgCCgDbhV_gJigHbgBigBggCqgPF?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="#fcffe6" /><stop offset="0.200" stop-color="#e7dfff" /><stop offset="0.400" stop-color="#cfc1ff" /><stop offset="0.600" stop-color="#c0aff9" /><stop offset="0.800" stop-color="#c4afd4" /><stop offset="1.000" stop-color="#d8c29c" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#fcffe6", "#e7dfff", "#cfc1ff", "#c0aff9", "#c4afd4", "#d8c29c"]

// https://grabient.com/_gNxgN_e6NgCCgDbhV_gJigHbgBigBggCqgPF?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(0.881, 0.895, -4.467);
    vec3 b = vec3(0.130, 0.219, 5.503);
    vec3 c = vec3(0.610, 0.475, 0.098);
    vec3 d = vec3(0.096, 0.170, 0.965);
    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);
}

[
  [0.881, 0.895, -4.467],
  [0.130, 0.219, 5.503],
  [0.610, 0.475, 0.098],
  [0.096, 0.170, 0.965]
]

Gradient palette editor — #fcffe6 to #d8c29c