The text-shadow CSS property adds shadows to text. It accepts a comma-separated list of shadows to be applied to the text and any of its decorations. Each shadow is described by some combination of X and Y offsets from the element, blur radius, and color.
/* offset-x | offset-y | blur-radius | color */
text-shadow: 1px 1px 2px black;
/* color | offset-x | offset-y | blur-radius */
text-shadow: #fc0 1px 0 10px;
/* offset-x | offset-y | color */
text-shadow: 5px 5px #558abb;
/* color | offset-x | offset-y */
text-shadow: white 2px 5px;
/* offset-x | offset-y
/* Use defaults for color and blur-radius */
text-shadow: 5px 10px;
/* Global values */
text-shadow: inherit;
text-shadow: initial;
text-shadow: unset;Source: https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow