/* https://grabient.com/_gIJgINgFQgC_gBDgCHgGOgKIgHzgP8gIbgJK?style=linearGradient&steps=6&angle=270 */

background: linear-gradient(270deg, #b57538 0.000%, #ac7e48 20.000%, #9a8b5d 40.000%, #829570 60.000%, #6b9678 80.000%, #5a8c73 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gIJgINgFQgC_gBDgCHgGOgKIgHzgP8gIbgJK?style=linearGradient&steps=6&angle=270 -->
            <defs>
              <linearGradient id="gradient" x1="1.000" y1="0.500" x2="0.000" y2="0.500">
        <stop offset="0.000" stop-color="#b57538" /><stop offset="0.200" stop-color="#ac7e48" /><stop offset="0.400" stop-color="#9a8b5d" /><stop offset="0.600" stop-color="#829570" /><stop offset="0.800" stop-color="#6b9678" /><stop offset="1.000" stop-color="#5a8c73" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#b57538", "#ac7e48", "#9a8b5d", "#829570", "#6b9678", "#5a8c73"]

// https://grabient.com/_gIJgINgFQgC_gBDgCHgGOgKIgHzgP8gIbgJK?style=linearGradient&steps=6&angle=270
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 6.0;
const float ANGLE = 270.0;

vec3 palette(float t) {
    vec3 a = vec3(0.521, 0.525, 0.336);
    vec3 b = vec3(0.191, 0.067, 0.135);
    vec3 c = vec3(0.398, 0.648, 0.499);
    vec3 d = vec3(1.020, 0.539, 0.586);
    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);
}

[
  [0.521, 0.525, 0.336],
  [0.191, 0.067, 0.135],
  [0.398, 0.648, 0.499],
  [1.020, 0.539, 0.586]
]

Gradient palette editor — #b57538 to #5a8c73