/* https://grabient.com/_f9PgLtgNagPqgCbgBEgBkgJXgZMgAzgOCgD0?style=linearGradient&steps=7&angle=180 */

background: linear-gradient(180deg, #c5dfdb 0.000%, #bce7ca 16.667%, #afdfde 33.333%, #a1cceb 50.000%, #90b3d4 66.667%, #7d9fcc 83.333%, #6897e6 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_f9PgLtgNagPqgCbgBEgBkgJXgZMgAzgOCgD0?style=linearGradient&steps=7&angle=180 -->
            <defs>
              <linearGradient id="gradient" x1="0.500" y1="0.000" x2="0.500" y2="1.000">
        <stop offset="0.000" stop-color="#c5dfdb" /><stop offset="0.167" stop-color="#bce7ca" /><stop offset="0.333" stop-color="#afdfde" /><stop offset="0.500" stop-color="#a1cceb" /><stop offset="0.667" stop-color="#90b3d4" /><stop offset="0.833" stop-color="#7d9fcc" /><stop offset="1.000" stop-color="#6897e6" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#c5dfdb", "#bce7ca", "#afdfde", "#a1cceb", "#90b3d4", "#7d9fcc", "#6897e6"]

// https://grabient.com/_f9PgLtgNagPqgCbgBEgBkgJXgZMgAzgOCgD0?style=linearGradient&steps=7&angle=180
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 180.0;

vec3 palette(float t) {
    vec3 a = vec3(-0.177, 0.749, 0.858);
    vec3 b = vec3(1.002, 0.155, 0.068);
    vec3 c = vec3(0.100, 0.599, 1.612);
    vec3 d = vec3(0.051, 0.898, 0.244);
    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);
}

[
  [-0.177, 0.749, 0.858],
  [1.002, 0.155, 0.068],
  [0.100, 0.599, 1.612],
  [0.051, 0.898, 0.244]
]

Gradient palette editor — #c5dfdb to #6897e6