Autumn deep brown to sepia to yellowish green gradient palette editor

/* https://grabient.com/_gHsgI5gChgEAgJHgCtgKHgFagIXgHCgHkgGp?style=linearGradient&steps=6&angle=135 */

background: linear-gradient(135deg, #3f0002 0.000%, #440500 20.000%, #6d260d 40.000%, #a05c28 60.000%, #bd9b44 80.000%, #b3d954 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gHsgI5gChgEAgJHgCtgKHgFagIXgHCgHkgGp?style=linearGradient&steps=6&angle=135 -->
            <defs>
              <linearGradient id="gradient" x1="0.146" y1="0.146" x2="0.854" y2="0.854">
        <stop offset="0.000" stop-color="#3f0002" /><stop offset="0.200" stop-color="#440500" /><stop offset="0.400" stop-color="#6d260d" /><stop offset="0.600" stop-color="#a05c28" /><stop offset="0.800" stop-color="#bd9b44" /><stop offset="1.000" stop-color="#b3d954" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#3f0002", "#440500", "#6d260d", "#a05c28", "#bd9b44", "#b3d954"]

// https://grabient.com/_gHsgI5gChgEAgJHgCtgKHgFagIXgHCgHkgGp?style=linearGradient&steps=6&angle=135
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 6.0;
const float ANGLE = 135.0;

vec3 palette(float t) {
    vec3 a = vec3(0.492, 0.569, 0.161);
    vec3 b = vec3(0.256, 0.583, 0.173);
    vec3 c = vec3(0.647, 0.346, 0.535);
    vec3 d = vec3(0.450, 0.484, 0.425);
    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);
}

[
  [0.492, 0.569, 0.161],
  [0.256, 0.583, 0.173],
  [0.647, 0.346, 0.535],
  [0.450, 0.484, 0.425]
]