Muted cement to metallic blue to grape gradient palette editor

/* https://grabient.com/_gJ0gHlgDgf7Cf7YgHyf5kf7zgCwgUuf2wfwVeXtgv2gC?style=angularSwatches&steps=15&angle=210 */

background: conic-gradient(from 210deg, #a6988c 0.000deg, #a6988c 24.000deg, #9a938c calc(24.000deg + 0.1deg), #9a938c 48.000deg, #8d8e8b calc(48.000deg + 0.1deg), #8d8e8b 72.000deg, #808889 calc(72.000deg + 0.1deg), #808889 96.000deg, #738187 calc(96.000deg + 0.1deg), #738187 120.000deg, #677a84 calc(120.000deg + 0.1deg), #677a84 144.000deg, #5c7280 calc(144.000deg + 0.1deg), #5c7280 168.000deg, #526b7c calc(168.000deg + 0.1deg), #526b7c 192.000deg, #4a6377 calc(192.000deg + 0.1deg), #4a6377 216.000deg, #445b71 calc(216.000deg + 0.1deg), #445b71 240.000deg, #41536b calc(240.000deg + 0.1deg), #41536b 264.000deg, #3f4b65 calc(264.000deg + 0.1deg), #3f4b65 288.000deg, #41445e calc(288.000deg + 0.1deg), #41445e 312.000deg, #443d56 calc(312.000deg + 0.1deg), #443d56 336.000deg, #4a364f calc(336.000deg + 0.1deg) 360.000deg);

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            <!-- https://grabient.com/_gJ0gHlgDgf7Cf7YgHyf5kf7zgCwgUuf2wfwVeXtgv2gC?style=angularSwatches&steps=15&angle=210 -->
            <defs>
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              </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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["#a6988c", "#9a938c", "#8d8e8b", "#808889", "#738187", "#677a84", "#5c7280", "#526b7c", "#4a6377", "#445b71", "#41536b", "#3f4b65", "#41445e", "#443d56", "#4a364f"]

// https://grabient.com/_gJ0gHlgDgf7Cf7YgHyf5kf7zgCwgUuf2wfwVeXtgv2gC?style=angularSwatches&steps=15&angle=210
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 15.0;
const float ANGLE = 210.0;

vec3 palette(float t) {
    vec3 a = vec3(0.523, 0.380, 0.119);
    vec3 b = vec3(-0.275, -0.256, 0.430);
    vec3 c = vec3(-0.418, -0.273, 0.178);
    vec3 d = vec3(1.328, -0.590, -1.001);
    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);
}

[
  [0.523, 0.380, 0.119],
  [-0.275, -0.256, 0.430],
  [-0.418, -0.273, 0.178],
  [1.328, -0.590, -1.001]
]