/* https://grabient.com/_gLvgOXgOCgEOgGhgFYgE-gEdgF-hI5hPkgCL?style=linearGradient&steps=4&angle=345 */

background: linear-gradient(345deg, #9cffff 0.000%, #c9ffdc 33.333%, #f1d5a0 66.667%, #ff9e8e 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gLvgOXgOCgEOgGhgFYgE-gEdgF-hI5hPkgCL?style=linearGradient&steps=4&angle=345 -->
            <defs>
              <linearGradient id="gradient" x1="0.629" y1="0.983" x2="0.371" y2="0.017">
        <stop offset="0.000" stop-color="#9cffff" /><stop offset="0.333" stop-color="#c9ffdc" /><stop offset="0.667" stop-color="#f1d5a0" /><stop offset="1.000" stop-color="#ff9e8e" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#9cffff", "#c9ffdc", "#f1d5a0", "#ff9e8e"]

// https://grabient.com/_gLvgOXgOCgEOgGhgFYgE-gEdgF-hI5hPkgCL?style=linearGradient&steps=4&angle=345
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 4.0;
const float ANGLE = 345.0;

vec3 palette(float t) {
    vec3 a = vec3(0.751, 0.919, 0.898);
    vec3 b = vec3(0.270, 0.417, 0.344);
    vec3 c = vec3(0.318, 0.285, 0.382);
    vec3 d = vec3(4.665, 5.092, 0.139);
    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);
}

[
  [0.751, 0.919, 0.898],
  [0.270, 0.417, 0.344],
  [0.318, 0.285, 0.382],
  [4.665, 5.092, 0.139]
]

Gradient palette editor — #9cffff to #ff9e8e