Gradient palette editor — #651300 to #61f71d

/* https://grabient.com/_gHdgIUgAvgG1gHvgBIgI1gIGgXQgLRgIxgI5?style=linearGradient&steps=7&angle=315 */

background: linear-gradient(315deg, #651300 0.000%, #a63c13 16.667%, #d77b1d 33.333%, #e9bd05 50.000%, #d5f100 66.667%, #a1ff13 83.333%, #61f71d 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gHdgIUgAvgG1gHvgBIgI1gIGgXQgLRgIxgI5?style=linearGradient&steps=7&angle=315 -->
            <defs>
              <linearGradient id="gradient" x1="0.854" y1="0.854" x2="0.146" y2="0.146">
        <stop offset="0.000" stop-color="#651300" /><stop offset="0.167" stop-color="#a63c13" /><stop offset="0.333" stop-color="#d77b1d" /><stop offset="0.500" stop-color="#e9bd05" /><stop offset="0.667" stop-color="#d5f100" /><stop offset="0.833" stop-color="#a1ff13" /><stop offset="1.000" stop-color="#61f71d" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#651300", "#a63c13", "#d77b1d", "#e9bd05", "#d5f100", "#a1ff13", "#61f71d"]

// https://grabient.com/_gHdgIUgAvgG1gHvgBIgI1gIGgXQgLRgIxgI5?style=linearGradient&steps=7&angle=315
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 7.0;
const float ANGLE = 315.0;

vec3 palette(float t) {
    vec3 a = vec3(0.477, 0.532, 0.047);
    vec3 b = vec3(0.437, 0.495, 0.072);
    vec3 c = vec3(0.565, 0.518, 1.488);
    vec3 d = vec3(0.721, 0.561, 0.569);
    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);
}

[
  [0.477, 0.532, 0.047],
  [0.437, 0.495, 0.072],
  [0.565, 0.518, 1.488],
  [0.721, 0.561, 0.569]
]