Complementary iris and dark forest green gradient palette editor

/* https://grabient.com/_gEngEngEngFRgFMgFigJMgJUgJjgckg6xhNt */

background: linear-gradient(90deg, #7451a4 0.000%, #98819c 16.667%, #a09d73 33.333%, #899a3b 50.000%, #5b7909 66.667%, #284700 83.333%, #011600 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gEngEngEngFRgFMgFigJMgJUgJjgckg6xhNt -->
            <defs>
              <linearGradient id="gradient" x1="0.000" y1="0.500" x2="1.000" y2="0.500">
        <stop offset="0.000" stop-color="#7451a4" /><stop offset="0.167" stop-color="#98819c" /><stop offset="0.333" stop-color="#a09d73" /><stop offset="0.500" stop-color="#899a3b" /><stop offset="0.667" stop-color="#5b7909" /><stop offset="0.833" stop-color="#284700" /><stop offset="1.000" stop-color="#011600" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#7451a4", "#98819c", "#a09d73", "#899a3b", "#5b7909", "#284700", "#011600"]

// https://grabient.com/_gEngEngEngFRgFMgFigJMgJUgJjgckg6xhNt
// 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(0.295, 0.295, 0.295);
    vec3 b = vec3(0.337, 0.332, 0.354);
    vec3 c = vec3(0.588, 0.596, 0.611);
    vec3 d = vec3(1.828, 3.761, 4.973);
    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);
}

[
  [0.295, 0.295, 0.295],
  [0.337, 0.332, 0.354],
  [0.588, 0.596, 0.611],
  [1.828, 3.761, 4.973]
]