/* https://grabient.com/_gH9e9bgIigIUhM_gA6gHngBjgUEgGNgOvgH2?style=linearGradient&steps=7&angle=135 */

background: linear-gradient(135deg, #165a7c 0.000%, #008188 16.667%, #039c99 33.333%, #2ca894 50.000%, #6aa882 66.667%, #ae9a7e 83.333%, #e77e8f 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gH9e9bgIigIUhM_gA6gHngBjgUEgGNgOvgH2?style=linearGradient&steps=7&angle=135 -->
            <defs>
              <linearGradient id="gradient" x1="0.146" y1="0.146" x2="0.854" y2="0.854">
        <stop offset="0.000" stop-color="#165a7c" /><stop offset="0.167" stop-color="#008188" /><stop offset="0.333" stop-color="#039c99" /><stop offset="0.500" stop-color="#2ca894" /><stop offset="0.667" stop-color="#6aa882" /><stop offset="0.833" stop-color="#ae9a7e" /><stop offset="1.000" stop-color="#e77e8f" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#165a7c", "#008188", "#039c99", "#2ca894", "#6aa882", "#ae9a7e", "#e77e8f"]

// https://grabient.com/_gH9e9bgIigIUhM_gA6gHngBjgUEgGNgOvgH2?style=linearGradient&steps=7&angle=135
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 135.0;

vec3 palette(float t) {
    vec3 a = vec3(0.509, -4.261, 0.546);
    vec3 b = vec3(0.532, 4.927, 0.058);
    vec3 c = vec3(0.487, 0.099, 1.284);
    vec3 d = vec3(0.397, 0.943, 0.502);
    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);
}

[
  [0.509, -4.261, 0.546],
  [0.532, 4.927, 0.058],
  [0.487, 0.099, 1.284],
  [0.397, 0.943, 0.502]
]

Gradient palette editor — #165a7c to #e77e8f