Gradient palette editor — #15a37b to #f3d1fd

/* https://grabient.com/_gEUgbRg_XgKxgRSg4DgEKgBigBlgLBgHugHm?style=linearGradient&steps=6&angle=225 */

background: linear-gradient(225deg, #15a37b 0.000%, #4fa478 20.000%, #88a984 40.000%, #bab29e 60.000%, #dfc0c7 80.000%, #f3d1fd 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gEUgbRg_XgKxgRSg4DgEKgBigBlgLBgHugHm?style=linearGradient&steps=6&angle=225 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.146" x2="0.146" y2="0.854">
        <stop offset="0.000" stop-color="#15a37b" /><stop offset="0.200" stop-color="#4fa478" /><stop offset="0.400" stop-color="#88a984" /><stop offset="0.600" stop-color="#bab29e" /><stop offset="0.800" stop-color="#dfc0c7" /><stop offset="1.000" stop-color="#f3d1fd" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#15a37b", "#4fa478", "#88a984", "#bab29e", "#dfc0c7", "#f3d1fd"]

// https://grabient.com/_gEUgbRg_XgKxgRSg4DgEKgBigBlgLBgHugHm?style=linearGradient&steps=6&angle=225
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 6.0;
const float ANGLE = 225.0;

vec3 palette(float t) {
    vec3 a = vec3(0.276, 1.745, 4.055);
    vec3 b = vec3(0.689, 1.106, 3.587);
    vec3 c = vec3(0.266, 0.098, 0.101);
    vec3 d = vec3(0.705, 0.494, 0.486);
    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);
}

[
  [0.276, 1.745, 4.055],
  [0.689, 1.106, 3.587],
  [0.266, 0.098, 0.101],
  [0.705, 0.494, 0.486]
]