/* https://grabient.com/_gKIgIYf7ggFrgDkgVOgF_gMwgFzgJNgG7gNo?style=linearGradient&steps=7&angle=315 */

background: linear-gradient(315deg, #5752a7 0.000%, #7056f3 16.667%, #927cff 33.333%, #b7abfa 50.000%, #d9c3b4 66.667%, #f3b248 83.333%, #ff8500 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gKIgIYf7ggFrgDkgVOgF_gMwgFzgJNgG7gNo?style=linearGradient&steps=7&angle=315 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.854" x2="0.146" y2="0.146">
        <stop offset="0.000" stop-color="#5752a7" /><stop offset="0.167" stop-color="#7056f3" /><stop offset="0.333" stop-color="#927cff" /><stop offset="0.500" stop-color="#b7abfa" /><stop offset="0.667" stop-color="#d9c3b4" /><stop offset="0.833" stop-color="#f3b248" /><stop offset="1.000" stop-color="#ff8500" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#5752a7", "#7056f3", "#927cff", "#b7abfa", "#d9c3b4", "#f3b248", "#ff8500"]

// https://grabient.com/_gKIgIYf7ggFrgDkgVOgF_gMwgFzgJNgG7gNo?style=linearGradient&steps=7&angle=315
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 315.0;

vec3 palette(float t) {
    vec3 a = vec3(0.648, 0.536, -0.288);
    vec3 b = vec3(0.363, 0.228, 1.358);
    vec3 c = vec3(0.383, 0.816, 0.371);
    vec3 d = vec3(0.589, 0.443, 0.872);
    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);
}

[
  [0.648, 0.536, -0.288],
  [0.363, 0.228, 1.358],
  [0.383, 0.816, 0.371],
  [0.589, 0.443, 0.872]
]

Gradient palette editor — #5752a7 to #ff8500