Forest to pale olive to beige gradient palette editor

/* https://grabient.com/_fVQf5FgGpg53gV7gG-gBigCvgIlgN7gNIgIA?style=linearSwatches&steps=3&angle=180 */

background: linear-gradient(180deg, #224f00 0.000%, #224f00 33.333%, #b4d086 calc(33.333% + 1px), #b4d086 66.667%, #f4f3d6 calc(66.667% + 1px) 100.000%);

<svg xmlns="http://www.w3.org/2000/svg" width="800" height="400" viewBox="0 0 800 400" preserveAspectRatio="none">
            <!-- https://grabient.com/_fVQf5FgGpg53gV7gG-gBigCvgIlgN7gNIgIA?style=linearSwatches&steps=3&angle=180 -->
            <defs>
              <clipPath id="bounds">
                <rect x="0" y="0" width="800" height="400" />
              </clipPath>
            </defs>
            <g clip-path="url(#bounds)"><path d="M -47.214,0.000 L 847.214,-0.000 L 847.214,133.333 L -47.214,133.333 Z" fill="#224f00" fill-opacity="1.000" /><path d="M -47.214,133.333 L 847.214,133.333 L 847.214,266.667 L -47.214,266.667 Z" fill="#b4d086" fill-opacity="1.000" /><path d="M -47.214,266.667 L 847.214,266.667 L 847.214,400.000 L -47.214,400.000 Z" fill="#f4f3d6" fill-opacity="1.000" /></g>
          </svg>

["#224f00", "#b4d086", "#f4f3d6"]

// https://grabient.com/_fVQf5FgGpg53gV7gG-gBigCvgIlgN7gNIgIA?style=linearSwatches&steps=3&angle=180
// cosine gradient palette — https://iquilezles.org/articles/palettes/
const float STEPS = 3.0;
const float ANGLE = 180.0;

vec3 palette(float t) {
    vec3 a = vec3(-2.736, -0.443, 0.425);
    vec3 b = vec3(3.703, 1.403, 0.446);
    vec3 c = vec3(0.098, 0.175, 0.549);
    vec3 d = vec3(0.891, 0.840, 0.512);
    return a + b * cos(6.283185 * (c * t + d));
}

// N hard swatches sampled from the palette
vec3 stops(float t) {
    float i = min(floor(clamp(t, 0.0, 1.0) * STEPS), STEPS - 1.0);
    return palette(i / (STEPS - 1.0));
}

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);
}

[
  [-2.736, -0.443, 0.425],
  [3.703, 1.403, 0.446],
  [0.098, 0.175, 0.549],
  [0.891, 0.840, 0.512]
]