Gradient palette editor — #563d22 to #3c5c7f

/* https://grabient.com/_gGGgGOgGQgCmgDOgEPgNYgKbgLPgK6gJkgHZ?style=linearGradient&steps=7&angle=315 */

background: linear-gradient(315deg, #563d22 0.000%, #7a5d2c 16.667%, #8e8056 33.333%, #819788 50.000%, #5e97a8 66.667%, #407fa4 83.333%, #3c5c7f 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gGGgGOgGQgCmgDOgEPgNYgKbgLPgK6gJkgHZ?style=linearGradient&steps=7&angle=315 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.854" x2="0.146" y2="0.146">
        <stop offset="0.000" stop-color="#563d22" /><stop offset="0.167" stop-color="#7a5d2c" /><stop offset="0.333" stop-color="#8e8056" /><stop offset="0.500" stop-color="#819788" /><stop offset="0.667" stop-color="#5e97a8" /><stop offset="0.833" stop-color="#407fa4" /><stop offset="1.000" stop-color="#3c5c7f" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#563d22", "#7a5d2c", "#8e8056", "#819788", "#5e97a8", "#407fa4", "#3c5c7f"]

// https://grabient.com/_gGGgGOgGQgCmgDOgEPgNYgKbgLPgK6gJkgHZ?style=linearGradient&steps=7&angle=315
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 315.0;

vec3 palette(float t) {
    vec3 a = vec3(0.390, 0.398, 0.400);
    vec3 b = vec3(0.166, 0.206, 0.271);
    vec3 c = vec3(0.856, 0.667, 0.719);
    vec3 d = vec3(0.698, 0.612, 0.473);
    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);
}

[
  [0.390, 0.398, 0.400],
  [0.166, 0.206, 0.271],
  [0.856, 0.667, 0.719],
  [0.698, 0.612, 0.473]
]