Gradient palette editor — #9698d9 to #ffffff

/* https://grabient.com/_gKNgv_gNjgITgmvgDzgCLgBkgCHgLbgHtgLk?style=linearGradient&steps=5&angle=270 */

background: linear-gradient(270deg, #9698d9 0.000%, #b49be6 25.000%, #d1aef3 50.000%, #ecd0ff 75.000%, #ffffff 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gKNgv_gNjgITgmvgDzgCLgBkgCHgLbgHtgLk?style=linearGradient&steps=5&angle=270 -->
            <defs>
              <linearGradient id="gradient" x1="1.000" y1="0.500" x2="0.000" y2="0.500">
        <stop offset="0.000" stop-color="#9698d9" /><stop offset="0.250" stop-color="#b49be6" /><stop offset="0.500" stop-color="#d1aef3" /><stop offset="0.750" stop-color="#ecd0ff" /><stop offset="1.000" stop-color="#ffffff" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#9698d9", "#b49be6", "#d1aef3", "#ecd0ff", "#ffffff"]

// https://grabient.com/_gKNgv_gNjgITgmvgDzgCLgBkgCHgLbgHtgLk?style=linearGradient&steps=5&angle=270
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 5.0;
const float ANGLE = 270.0;

vec3 palette(float t) {
    vec3 a = vec3(0.653, 3.071, 0.867);
    vec3 b = vec3(0.531, 2.479, 0.243);
    vec3 c = vec3(0.139, 0.100, 0.135);
    vec3 d = vec3(0.731, 0.493, 0.740);
    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);
}

[
  [0.653, 3.071, 0.867],
  [0.531, 2.479, 0.243],
  [0.139, 0.100, 0.135],
  [0.731, 0.493, 0.740]
]