Gradient palette editor — #5210b4 to #838cb2

/* https://grabient.com/_gHrgDEgHfgE8gIsgD-gg1gGtgfZgKVgLIgBM?style=angularSwatches&steps=12&angle=45 */

background: conic-gradient(from 45deg, #5210b4 0.000deg, #5210b4 30.000deg, #ad3377 calc(30.000deg + 0.1deg), #ad3377 60.000deg, #cb553e calc(60.000deg + 0.1deg), #cb553e 90.000deg, #85764c calc(90.000deg + 0.1deg), #85764c 120.000deg, #359291 calc(120.000deg + 0.1deg), #359291 150.000deg, #41a8bb calc(150.000deg + 0.1deg), #41a8bb 180.000deg, #99b899 calc(180.000deg + 0.1deg), #99b899 210.000deg, #cebf53 calc(210.000deg + 0.1deg), #cebf53 240.000deg, #9bbe3b calc(240.000deg + 0.1deg), #9bbe3b 270.000deg, #42b56e calc(270.000deg + 0.1deg), #42b56e 300.000deg, #35a4af calc(300.000deg + 0.1deg), #35a4af 330.000deg, #838cb2 calc(330.000deg + 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/_gHrgDEgHfgE8gIsgD-gg1gGtgfZgKVgLIgBM?style=angularSwatches&steps=12&angle=45 -->
            <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">
          <path d="
              M 400.000,200.000
              L 716.228,-116.228
              A 447.214,447.214 0 0 1 831.976,84.252
              Z
            " fill="#5210b4" fill-opacity="1.000" /><path d="
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              L 831.976,84.252
              A 447.214,447.214 0 0 1 831.976,315.748
              Z
            " fill="#ad3377" fill-opacity="1.000" /><path d="
              M 400.000,200.000
              L 831.976,315.748
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              Z
            " fill="#cb553e" fill-opacity="1.000" /><path d="
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              L 716.228,516.228
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              Z
            " fill="#85764c" fill-opacity="1.000" /><path d="
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              Z
            " fill="#359291" fill-opacity="1.000" /><path d="
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              Z
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              Z
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              Z
            " fill="#cebf53" fill-opacity="1.000" /><path d="
              M 400.000,200.000
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              A 447.214,447.214 0 0 1 83.772,-116.228
              Z
            " fill="#9bbe3b" fill-opacity="1.000" /><path d="
              M 400.000,200.000
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              Z
            " fill="#42b56e" fill-opacity="1.000" /><path d="
              M 400.000,200.000
              L 284.252,-231.976
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              Z
            " fill="#35a4af" fill-opacity="1.000" /><path d="
              M 400.000,200.000
              L 515.748,-231.976
              A 447.214,447.214 0 0 1 716.228,-116.228
              Z
            " fill="#838cb2" fill-opacity="1.000" /></g>
        </svg>

["#5210b4", "#ad3377", "#cb553e", "#85764c", "#359291", "#41a8bb", "#99b899", "#cebf53", "#9bbe3b", "#42b56e", "#35a4af", "#838cb2"]

// https://grabient.com/_gHrgDEgHfgE8gIsgD-gg1gGtgfZgKVgLIgBM?style=angularSwatches&steps=12&angle=45
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 12.0;
const float ANGLE = 45.0;

vec3 palette(float t) {
    vec3 a = vec3(0.491, 0.196, 0.479);
    vec3 b = vec3(0.316, 0.556, 0.254);
    vec3 c = vec3(2.101, 0.429, 2.009);
    vec3 d = vec3(0.661, 0.712, 0.076);
    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);
}

[
  [0.491, 0.196, 0.479],
  [0.316, 0.556, 0.254],
  [2.101, 0.429, 2.009],
  [0.661, 0.712, 0.076]
]