/* https://grabient.com/_gQxgI8gJrf-cf8GgENf3_f1hf5vgBDgBuf-w?style=linearGradient&steps=3&angle=45 */

background: linear-gradient(45deg, #fa61da 0.000%, #ff8891 50.000%, #ffcd5a 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gQxgI8gJrf-cf8GgENf3_f1hf5vgBDgBuf-w?style=linearGradient&steps=3&angle=45 -->
            <defs>
              <linearGradient id="gradient" x1="0.146" y1="0.854" x2="0.854" y2="0.146">
        <stop offset="0.000" stop-color="#fa61da" /><stop offset="0.500" stop-color="#ff8891" /><stop offset="1.000" stop-color="#ffcd5a" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#fa61da", "#ff8891", "#ffcd5a"]

// https://grabient.com/_gQxgI8gJrf-cf8GgENf3_f1hf5vgBDgBuf-w?style=linearGradient&steps=3&angle=45
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 3.0;
const float ANGLE = 45.0;

vec3 palette(float t) {
    vec3 a = vec3(1.073, 0.572, 0.619);
    vec3 b = vec3(-0.100, -0.250, 0.269);
    vec3 c = vec3(-0.513, -0.671, -0.401);
    vec3 d = vec3(0.067, 0.110, -0.080);
    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);
}

[
  [1.073, 0.572, 0.619],
  [-0.100, -0.250, 0.269],
  [-0.513, -0.671, -0.401],
  [0.067, 0.110, -0.080]
]

Gradient palette editor — #fa61da to #ffcd5a