<svg xmlns="http://www.w3.org/2000/svg">
<filter id="filter">
<feTurbulence type="fractalNoise" baseFrequency=".1 .01"/>
<feColorMatrix values="0 0 0 .11 .69
0 0 0 .09 .38
0 0 0 .08 .14
0 0 0 0 1"/>
</filter>
<rect width="100%" height="100%" filter="url(#filter)"/>
</svg>
/* Add the seed attribute and set it to a random integer in <feTurbulence> to create your own variant! */
/* Minified (256 bytes):
<svg xmlns="http://www.w3.org/2000/svg"><filter id="a"><feTurbulence type="fractalNoise" baseFrequency=".1 .01"/><feColorMatrix values="0 0 0 .11 .69 0 0 0 .09 .38 0 0 0 .08 .14 0 0 0 0 1"/></filter><rect width="100%" height="100%" filter="url(#a)"/></svg>
*/