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In HTML 4, all styling html element have been deprecated in favor of CSS because the markups (ie element) should be style-independent and define only logical component.
Therefore you should define your font with CSS. See the CSS font page
font in HTML is an element that permits to define the font properties for a text.
This is by default an inline element and therefore can be used to change text visualisation in a paragraph
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Example
<font color="fuchsia" >fuchsia color name</font>