Light purple to eggshell gradient palette editor

/* https://grabient.com/_gTCgNAgLlgH6gIOgEAgN3gMogMqgV_gFcgPe?style=linearSwatches&steps=3&angle=90 */

background: linear-gradient(90deg, #cb87fe 0.000%, #cb87fe 33.333%, #ffd689 calc(33.333% + 1px), #ffd689 66.667%, #ffffd1 calc(66.667% + 1px) 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gTCgNAgLlgH6gIOgEAgN3gMogMqgV_gFcgPe?style=linearSwatches&steps=3&angle=90 -->
            <defs>
              <clipPath id="bounds">
                <rect x="0" y="0" width="800" height="400" />
              </clipPath>
            </defs>
            <g clip-path="url(#bounds)"><path d="M 0.000,647.214 L 0.000,-247.214 L 266.667,-247.214 L 266.667,647.214 Z" fill="#cb87fe" fill-opacity="1.000" /><path d="M 266.667,647.214 L 266.667,-247.214 L 533.333,-247.214 L 533.333,647.214 Z" fill="#ffd689" fill-opacity="1.000" /><path d="M 533.333,647.214 L 533.333,-247.214 L 800.000,-247.214 L 800.000,647.214 Z" fill="#ffffd1" fill-opacity="1.000" /></g>
          </svg>

["#cb87fe", "#ffd689", "#ffffd1"]

// https://grabient.com/_gTCgNAgLlgH6gIOgEAgN3gMogMqgV_gFcgPe?style=linearSwatches&steps=3&angle=90
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 3.0;
const float ANGLE = 90.0;

vec3 palette(float t) {
    vec3 a = vec3(1.218, 0.832, 0.741);
    vec3 b = vec3(0.506, 0.526, 0.256);
    vec3 c = vec3(0.887, 0.808, 0.810);
    vec3 d = vec3(1.407, 0.348, 0.990);
    return a + b * cos(6.283185 * (c * t + d));
}

// N hard swatches sampled from the palette
vec3 stops(float t) {
    float i = min(floor(clamp(t, 0.0, 1.0) * STEPS), STEPS - 1.0);
    return palette(i / (STEPS - 1.0));
}

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);
}

[
  [1.218, 0.832, 0.741],
  [0.506, 0.526, 0.256],
  [0.887, 0.808, 0.810],
  [1.407, 0.348, 0.990]
]