Ugly blue to jade to gainsboro gradient palette editor

/* https://grabient.com/_gHUgJRgNMgGMgE5gFegFkgG5gEsgnuhIdgHA */

background: linear-gradient(90deg, #166383 0.000%, #26847e 16.667%, #42a882 33.333%, #64c98e 50.000%, #8ae0a2 66.667%, #ade7bb 83.333%, #c8ded6 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gHUgJRgNMgGMgE5gFegFkgG5gEsgnuhIdgHA -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#166383" /><stop offset="0.167" stop-color="#26847e" /><stop offset="0.333" stop-color="#42a882" /><stop offset="0.500" stop-color="#64c98e" /><stop offset="0.667" stop-color="#8ae0a2" /><stop offset="0.833" stop-color="#ade7bb" /><stop offset="1.000" stop-color="#c8ded6" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#166383", "#26847e", "#42a882", "#64c98e", "#8ae0a2", "#ade7bb", "#c8ded6"]

// https://grabient.com/_gHUgJRgNMgGMgE5gFegFkgG5gEsgnuhIdgHA
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 90.0;

vec3 palette(float t) {
    vec3 a = vec3(0.468, 0.593, 0.844);
    vec3 b = vec3(0.396, 0.313, 0.350);
    vec3 c = vec3(0.356, 0.441, 0.300);
    vec3 d = vec3(2.542, 4.637, 0.448);
    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);
}

[
  [0.468, 0.593, 0.844],
  [0.396, 0.313, 0.350],
  [0.356, 0.441, 0.300],
  [2.542, 4.637, 0.448]
]