html, body { height: 100%; }
body { margin: 0; }

img {
    height: 100%;
    width: 100%;
    -o-object-fit: cover;
       object-fit: cover;
}

input { 
    padding: 0;
    border: none; 
    position: absolute;
    width: 100%; 
    height: 100%;
    mix-blend-mode: hue;
    cursor: pointer;
}

::-webkit-color-swatch {
    border: none;
}

::-webkit-color-swatch-wrapper {
    padding: 0;
}

::-moz-color-swatch,
::-moz-focus-inner {
    border: none;
}

::-moz-focus-inner {
    padding: 0;
}