Gradient palette editor — #271d1f to #564123

/* https://grabient.com/_gEMgDzgCHgEzgCDgBFgOGgLdgX2gE4gH2gLO?style=linearGradient&steps=8&angle=270 */

background: linear-gradient(270deg, #271d1f 0.000%, #002433 14.286%, #00362c 28.571%, #2b4b16 42.857%, #695b14 57.143%, #905f29 71.429%, #885534 85.714%, #564123 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gEMgDzgCHgEzgCDgBFgOGgLdgX2gE4gH2gLO?style=linearGradient&steps=8&angle=270 -->
            <defs>
              <linearGradient id="gradient" x1="1.000" y1="0.500" x2="0.000" y2="0.500">
        <stop offset="0.000" stop-color="#271d1f" /><stop offset="0.143" stop-color="#002433" /><stop offset="0.286" stop-color="#00362c" /><stop offset="0.429" stop-color="#2b4b16" /><stop offset="0.571" stop-color="#695b14" /><stop offset="0.714" stop-color="#905f29" /><stop offset="0.857" stop-color="#885534" /><stop offset="1.000" stop-color="#564123" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#271d1f", "#002433", "#00362c", "#2b4b16", "#695b14", "#905f29", "#885534", "#564123"]

// https://grabient.com/_gEMgDzgCHgEzgCDgBFgOGgLdgX2gE4gH2gLO?style=linearGradient&steps=8&angle=270
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 8.0;
const float ANGLE = 270.0;

vec3 palette(float t) {
    vec3 a = vec3(0.268, 0.243, 0.135);
    vec3 b = vec3(0.307, 0.131, 0.069);
    vec3 c = vec3(0.902, 0.733, 1.526);
    vec3 d = vec3(0.312, 0.502, 0.718);
    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);
}

[
  [0.268, 0.243, 0.135],
  [0.307, 0.131, 0.069],
  [0.902, 0.733, 1.526],
  [0.312, 0.502, 0.718]
]