Gradient palette editor — #6b4128 to #d9c639

/* https://grabient.com/_gJPgeVgCzgEGga8gA2gGFgBjgYqgJ7gIVgE9 */

background: linear-gradient(90deg, #6b4128 0.000%, #824c22 16.667%, #9d5d35 33.333%, #b77138 50.000%, #cb8a24 66.667%, #d7a624 83.333%, #d9c639 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gJPgeVgCzgEGga8gA2gGFgBjgYqgJ7gIVgE9 -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#6b4128" /><stop offset="0.167" stop-color="#824c22" /><stop offset="0.333" stop-color="#9d5d35" /><stop offset="0.500" stop-color="#b77138" /><stop offset="0.667" stop-color="#cb8a24" /><stop offset="0.833" stop-color="#d7a624" /><stop offset="1.000" stop-color="#d9c639" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#6b4128", "#824c22", "#9d5d35", "#b77138", "#cb8a24", "#d7a624", "#d9c639"]

// https://grabient.com/_gJPgeVgCzgEGga8gA2gGFgBjgYqgJ7gIVgE9
// 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(0.591, 1.941, 0.179);
    vec3 b = vec3(0.262, 1.724, 0.054);
    vec3 c = vec3(0.389, 0.099, 1.578);
    vec3 d = vec3(0.635, 0.533, 0.317);
    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);
}

[
  [0.591, 1.941, 0.179],
  [0.262, 1.724, 0.054],
  [0.389, 0.099, 1.578],
  [0.635, 0.533, 0.317]
]