/* https://grabient.com/_eOngFZhdYh9DgCChb6gBjgeIgBigPFgCagHh?style=linearGradient&steps=7&angle=315 */

background: linear-gradient(315deg, #8d6b23 0.000%, #b03718 16.667%, #be621d 33.333%, #b67033 50.000%, #983957 66.667%, #645a8b 83.333%, #1b75cd 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_eOngFZhdYh9DgCChb6gBjgeIgBigPFgCagHh?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="#8d6b23" /><stop offset="0.167" stop-color="#b03718" /><stop offset="0.333" stop-color="#be621d" /><stop offset="0.500" stop-color="#b67033" /><stop offset="0.667" stop-color="#983957" /><stop offset="0.833" stop-color="#645a8b" /><stop offset="1.000" stop-color="#1b75cd" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#8d6b23", "#b03718", "#be621d", "#b67033", "#983957", "#645a8b", "#1b75cd"]

// https://grabient.com/_eOngFZhdYh9DgCChb6gBjgeIgBigPFgCagHh?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(-7.257, 0.345, 5.976);
    vec3 b = vec3(8.003, 0.130, 5.882);
    vec3 c = vec3(0.099, 1.928, 0.098);
    vec3 d = vec3(0.965, 0.154, 0.481);
    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);
}

[
  [-7.257, 0.345, 5.976],
  [8.003, 0.130, 5.882],
  [0.099, 1.928, 0.098],
  [0.965, 0.154, 0.481]
]

Gradient palette editor — #8d6b23 to #1b75cd