Gradient palette editor — #0f258f to #4b2400

/* https://grabient.com/_gDLgG-eHBgChgExiD6gJCgQSgBigI-gHXgPL?style=linearGradient&steps=7&angle=270 */

background: linear-gradient(270deg, #0f258f 0.000%, #2042ab 16.667%, #3892b2 33.333%, #4fbfa1 50.000%, #5b997a 66.667%, #5a483d 83.333%, #4b2400 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gDLgG-eHBgChgExiD6gJCgQSgBigI-gHXgPL?style=linearGradient&steps=7&angle=270 -->
            <defs>
              <linearGradient id="gradient" x1="1.000" y1="0.500" x2="0.000" y2="0.500">
        <stop offset="0.000" stop-color="#0f258f" /><stop offset="0.167" stop-color="#2042ab" /><stop offset="0.333" stop-color="#3892b2" /><stop offset="0.500" stop-color="#4fbfa1" /><stop offset="0.667" stop-color="#5b997a" /><stop offset="0.833" stop-color="#5a483d" /><stop offset="1.000" stop-color="#4b2400" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#0f258f", "#2042ab", "#3892b2", "#4fbfa1", "#5b997a", "#5a483d", "#4b2400"]

// https://grabient.com/_gDLgG-eHBgChgExiD6gJCgQSgBigI-gHXgPL?style=linearGradient&steps=7&angle=270
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 270.0;

vec3 palette(float t) {
    vec3 a = vec3(0.203, 0.446, -7.743);
    vec3 b = vec3(0.161, 0.305, 8.442);
    vec3 c = vec3(0.578, 1.042, 0.098);
    vec3 d = vec3(0.574, 0.471, 0.971);
    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);
}

[
  [0.203, 0.446, -7.743],
  [0.161, 0.305, 8.442],
  [0.578, 1.042, 0.098],
  [0.574, 0.471, 0.971]
]