Here is some of the CSS where I suspect the problem lies: (declared in-line with style tags) .green{filter:invert(48%) sepia(79%) saturate(2476%) hue-rotate(86deg) brightness(118%) contrast(119%)} .gray{filter:invert(16%) sepia(10%) saturate(267%) hue-rotate(169deg) brightness(90%) contrast(93%)} .red{filter:invert(9%) sepia(98%) saturate(6552%) hue-rotate(0deg) brightness(96%) contrast(110%)}