Gradient palette editor — #8a120b to #67380f

/* https://grabient.com/_gD8gCKgDagEjgC9gDugMzgNpgThgP6gEzgF_?style=linearGradient&steps=8&angle=225 */

background: linear-gradient(225deg, #8a120b 0.000%, #710000 14.286%, #3f0034 28.571%, #0e0f6c 42.857%, #003469 57.143%, #054f2e 71.429%, #325100 85.714%, #67380f 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gD8gCKgDagEjgC9gDugMzgNpgThgP6gEzgF_?style=linearGradient&steps=8&angle=225 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.146" x2="0.146" y2="0.854">
        <stop offset="0.000" stop-color="#8a120b" /><stop offset="0.143" stop-color="#710000" /><stop offset="0.286" stop-color="#3f0034" /><stop offset="0.429" stop-color="#0e0f6c" /><stop offset="0.571" stop-color="#003469" /><stop offset="0.714" stop-color="#054f2e" /><stop offset="0.857" stop-color="#325100" /><stop offset="1.000" stop-color="#67380f" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#8a120b", "#710000", "#3f0034", "#0e0f6c", "#003469", "#054f2e", "#325100", "#67380f"]

// https://grabient.com/_gD8gCKgDagEjgC9gDugMzgNpgThgP6gEzgF_?style=linearGradient&steps=8&angle=225
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 8.0;
const float ANGLE = 225.0;

vec3 palette(float t) {
    vec3 a = vec3(0.252, 0.138, 0.218);
    vec3 b = vec3(0.291, 0.189, 0.238);
    vec3 c = vec3(0.819, 0.873, 1.249);
    vec3 d = vec3(1.018, 0.307, 0.383);
    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);
}

[
  [0.252, 0.138, 0.218],
  [0.291, 0.189, 0.238],
  [0.819, 0.873, 1.249],
  [1.018, 0.307, 0.383]
]