Dark purple to dark gray blue to french blue gradient palette editor

/* https://grabient.com/_gFLgBGgHaf9AgFDf8yf5XgEWf11fyzfsYgQx?style=angularSwatches&steps=13&angle=210 */

background: conic-gradient(from 210deg, #390f4a 0.000deg, #390f4a 27.692deg, #311b45 calc(27.692deg + 0.1deg), #311b45 55.385deg, #2a2746 calc(55.385deg + 0.1deg), #2a2746 83.077deg, #26324c calc(83.077deg + 0.1deg), #26324c 110.769deg, #243d58 calc(110.769deg + 0.1deg), #243d58 138.462deg, #244668 calc(138.462deg + 0.1deg), #244668 166.154deg, #274f7a calc(166.154deg + 0.1deg), #274f7a 193.846deg, #2c568b calc(193.846deg + 0.1deg), #2c568b 221.538deg, #335c9b calc(221.538deg + 0.1deg), #335c9b 249.231deg, #3b61a6 calc(249.231deg + 0.1deg), #3b61a6 276.923deg, #4563ac calc(276.923deg + 0.1deg), #4563ac 304.615deg, #5064ad calc(304.615deg + 0.1deg), #5064ad 332.308deg, #5b63a7 calc(332.308deg + 0.1deg) 360.000deg);

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            <!-- https://grabient.com/_gFLgBGgHaf9AgFDf8yf5XgEWf11fyzfsYgQx?style=angularSwatches&steps=13&angle=210 -->
            <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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["#390f4a", "#311b45", "#2a2746", "#26324c", "#243d58", "#244668", "#274f7a", "#2c568b", "#335c9b", "#3b61a6", "#4563ac", "#5064ad", "#5b63a7"]

// https://grabient.com/_gFLgBGgHaf9AgFDf8yf5XgEWf11fyzfsYgQx?style=angularSwatches&steps=13&angle=210
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 13.0;
const float ANGLE = 210.0;

vec3 palette(float t) {
    vec3 a = vec3(0.331, 0.070, 0.474);
    vec3 b = vec3(-0.192, 0.323, -0.206);
    vec3 c = vec3(-0.425, 0.278, -0.651);
    vec3 d = vec3(-0.845, -1.256, 1.073);
    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);
}

[
  [0.331, 0.070, 0.474],
  [-0.192, 0.323, -0.206],
  [-0.425, 0.278, -0.651],
  [-0.845, -1.256, 1.073]
]