An inline style loses many of the advantages of style sheets by mixing content with presentation. Use this method sparingly!
To use inline styles you use the style attribute in the relevant tag. The style attribute can contain any CSS property. The example shows how to change the color and the left margin of a paragraph.
<p style="color:sienna;margin-left:20px">This is a paragraph.</p>
It was in 90s now you shouldn't use inline css its hard to edit i mean you should change t all places where have added and its makes html code garbage.