/* https://grabient.com/_fApf6GgDYhOGgTpgAhgBogBggKegOxgNTgGv */

background: linear-gradient(90deg, #a55e2f 0.000%, #cd772f 16.667%, #e68d32 33.333%, #f0a238 50.000%, #ebb43d 66.667%, #d7c23f 83.333%, #b5cf3e 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_fApf6GgDYhOGgTpgAhgBogBggKegOxgNTgGv -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#a55e2f" /><stop offset="0.167" stop-color="#cd772f" /><stop offset="0.333" stop-color="#e68d32" /><stop offset="0.500" stop-color="#f0a238" /><stop offset="0.667" stop-color="#ebb43d" /><stop offset="0.833" stop-color="#d7c23f" /><stop offset="1.000" stop-color="#b5cf3e" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#a55e2f", "#cd772f", "#e68d32", "#f0a238", "#ebb43d", "#d7c23f", "#b5cf3e"]

// https://grabient.com/_fApf6GgDYhOGgTpgAhgBogBggKegOxgNTgGv
// 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(-4.055, -0.378, 0.216);
    vec3 b = vec3(4.998, 1.257, 0.033);
    vec3 c = vec3(0.104, 0.096, 0.670);
    vec3 d = vec3(0.945, 0.851, 0.431);
    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);
}

[
  [-4.055, -0.378, 0.216],
  [4.998, 1.257, 0.033],
  [0.104, 0.096, 0.670],
  [0.945, 0.851, 0.431]
]

Gradient palette editor — #a55e2f to #b5cf3e