Duotone dark blue gray and cement gradient palette editor

/* https://grabient.com/_gF0gIDgMIgE-gEof4Of5kf7zgCwgVTf3Vfw6 */

background: linear-gradient(90deg, #2a3c4a 0.000%, #494651 16.667%, #6b555c 33.333%, #8c676a 50.000%, #a47c7c 66.667%, #af9190 83.333%, #aca5a6 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gF0gIDgMIgE-gEof4Of5kf7zgCwgVTf3Vfw6 -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#2a3c4a" /><stop offset="0.167" stop-color="#494651" /><stop offset="0.333" stop-color="#6b555c" /><stop offset="0.500" stop-color="#8c676a" /><stop offset="0.667" stop-color="#a47c7c" /><stop offset="0.833" stop-color="#af9190" /><stop offset="1.000" stop-color="#aca5a6" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#2a3c4a", "#494651", "#6b555c", "#8c676a", "#a47c7c", "#af9190", "#aca5a6"]

// https://grabient.com/_gF0gIDgMIgE-gEof4Of5kf7zgCwgVTf3Vfw6
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 90.0;

vec3 palette(float t) {
    vec3 a = vec3(0.372, 0.515, 0.776);
    vec3 b = vec3(0.318, 0.296, -0.498);
    vec3 c = vec3(-0.412, -0.269, 0.176);
    vec3 d = vec3(1.363, -0.555, -0.966);
    return a + b * cos(6.283185 * (c * t + d));
}

// N stops sampled from the palette, blended like the CSS gradient
vec3 stops(float t) {
    float n = STEPS - 1.0;
    float x = clamp(t, 0.0, 1.0) * n;
    return mix(palette(floor(x) / n), palette(min(floor(x) + 1.0, n) / n), fract(x));
}

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);
}

[
  [0.372, 0.515, 0.776],
  [0.318, 0.296, -0.498],
  [-0.412, -0.269, 0.176],
  [1.363, -0.555, -0.966]
]