Dark teal to military green to sand brown gradient palette editor

/* https://grabient.com/_gHJgHugIXgFjgEigD_gGLgDXgDsg3KhX5gWc?style=linearGradient&steps=3&angle=45 */

background: linear-gradient(45deg, #1c4a4d 0.000%, #68764b 50.000%, #c5a66a 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_gHJgHugIXgFjgEigD_gGLgDXgDsg3KhX5gWc?style=linearGradient&steps=3&angle=45 -->
            <defs>
              <linearGradient id="gradient" x1="0.146" y1="0.854" x2="0.854" y2="0.146">
        <stop offset="0.000" stop-color="#1c4a4d" /><stop offset="0.500" stop-color="#68764b" /><stop offset="1.000" stop-color="#c5a66a" />
              </linearGradient>
            </defs>
            <rect x="0" y="0" width="800" height="400" fill="url(#gradient)" />
          </svg>

["#1c4a4d", "#68764b", "#c5a66a"]

// https://grabient.com/_gHJgHugIXgFjgEigD_gGLgDXgDsg3KhX5gWc?style=linearGradient&steps=3&angle=45
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 3.0;
const float ANGLE = 45.0;

vec3 palette(float t) {
    vec3 a = vec3(0.457, 0.494, 0.535);
    vec3 b = vec3(0.355, 0.290, 0.255);
    vec3 c = vec3(0.395, 0.215, 0.236);
    vec3 d = vec3(3.530, 5.625, 1.436);
    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);
}

[
  [0.457, 0.494, 0.535],
  [0.355, 0.290, 0.255],
  [0.395, 0.215, 0.236],
  [3.530, 5.625, 1.436]
]