Gradient palette editor — #48ffff to #fdb000

/* https://grabient.com/_gIagJDgH1gJtgIjgL4gDFgDZgFrgp7gAAggu?style=linearGradient&steps=8&angle=180 */

background: linear-gradient(180deg, #48ffff 0.000%, #63fff6 14.286%, #7fffbe 28.571%, #9aff80 42.857%, #b6f742 57.143%, #d0e20b 71.429%, #e8ca00 85.714%, #fdb000 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gIagJDgH1gJtgIjgL4gDFgDZgFrgp7gAAggu?style=linearGradient&steps=8&angle=180 -->
            <defs>
              <linearGradient id="gradient" x1="0.500" y1="0.000" x2="0.500" y2="1.000">
        <stop offset="0.000" stop-color="#48ffff" /><stop offset="0.143" stop-color="#63fff6" /><stop offset="0.286" stop-color="#7fffbe" /><stop offset="0.429" stop-color="#9aff80" /><stop offset="0.571" stop-color="#b6f742" /><stop offset="0.714" stop-color="#d0e20b" /><stop offset="0.857" stop-color="#e8ca00" /><stop offset="1.000" stop-color="#fdb000" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#48ffff", "#63fff6", "#7fffbe", "#9aff80", "#b6f742", "#d0e20b", "#e8ca00", "#fdb000"]

// https://grabient.com/_gIagJDgH1gJtgIjgL4gDFgDZgFrgp7gAAggu?style=linearGradient&steps=8&angle=180
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 8.0;
const float ANGLE = 180.0;

vec3 palette(float t) {
    vec3 a = vec3(0.538, 0.579, 0.501);
    vec3 b = vec3(0.621, 0.547, 0.760);
    vec3 c = vec3(0.197, 0.217, 0.363);
    vec3 d = vec3(2.683, 0.000, 2.094);
    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);
}

[
  [0.538, 0.579, 0.501],
  [0.621, 0.547, 0.760],
  [0.197, 0.217, 0.363],
  [2.683, 0.000, 2.094]
]