White gradient palette editor

/* https://grabient.com/_gKOgNTgMfgJvgJ2gJagDPgDVgByhhnhhvgFbfgvowYqE?style=angularSwatches&steps=13&angle=90 */

background: conic-gradient(from 90deg, #ffffff 0.000deg, #ffffff 27.692deg, #ffffff calc(27.692deg + 0.1deg), #ffffff 55.385deg, #ffffff calc(55.385deg + 0.1deg), #ffffff 83.077deg, #ffffff calc(83.077deg + 0.1deg), #ffffff 110.769deg, #ffffff calc(110.769deg + 0.1deg), #ffffff 138.462deg, #ffffff calc(138.462deg + 0.1deg), #ffffff 166.154deg, #ffffff calc(166.154deg + 0.1deg), #ffffff 193.846deg, #ffffff calc(193.846deg + 0.1deg), #ffffff 221.538deg, #ffffff calc(221.538deg + 0.1deg), #ffffff 249.231deg, #ffffff calc(249.231deg + 0.1deg), #ffffff 276.923deg, #ffffff calc(276.923deg + 0.1deg), #ffffff 304.615deg, #ffffff calc(304.615deg + 0.1deg), #ffffff 332.308deg, #ffffff calc(332.308deg + 0.1deg) 360.000deg);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gKOgNTgMfgJvgJ2gJagDPgDVgByhhnhhvgFbfgvowYqE?style=angularSwatches&steps=13&angle=90 -->
            <defs>
              <clipPath id="squareClip">
                <rect x="0" y="0" width="800" height="400" />
              </clipPath>
              <filter id="antiGap">
                <feGaussianBlur in="SourceGraphic" stdDeviation="0.3" />
              </filter>
            </defs>
            <g clip-path="url(#squareClip)" filter="url(#antiGap)" shape-rendering="crispEdges">
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              Z
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              Z
            " fill="#ffffff" fill-opacity="1.000" /><path d="
              M 400.000,200.000
              L 795.989,-7.829
              A 447.214,447.214 0 0 1 847.214,200.000
              Z
            " fill="#ffffff" fill-opacity="1.000" /></g>
        </svg>

["#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff", "#ffffff"]

// https://grabient.com/_gKOgNTgMfgJvgJ2gJagDPgDVgByhhnhhvgFbfgvowYqE?style=angularSwatches&steps=13&angle=90
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 13.0;
const float ANGLE = 90.0;

vec3 palette(float t) {
    vec3 a = vec3(0.622, 0.819, 0.767);
    vec3 b = vec3(0.623, 0.630, 0.602);
    vec3 c = vec3(0.217, 0.223, 0.119);
    vec3 d = vec3(6.891, 6.899, 0.991);
    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;
    // conic from ANGLE, clockwise from top (CSS convention)
    float t = fract((atan(p.x, p.y) - radians(ANGLE)) / 6.283185);
    fragColor = vec4(stops(t), 1.0);
}

[
  [0.622, 0.819, 0.767],
  [0.623, 0.630, 0.602],
  [0.217, 0.223, 0.119],
  [6.891, 6.899, 0.991]
]