Given a in HTML I want to change its color on mouse over.

Great ! Ch anging the color of an element on mouse over can be a useful way to provide visual feedback to users . To achieve this , you can use CSS ' s : hover pseudo - class . \n Here ' s an example of how you can modify the color of an element ( in this case , a span ) on mouse over : \n HTML : \n ``` html \n <</a> span style =" color : blue ;"> Click me ! span \n ``` \n CSS : \n ``` css \n \n span : hover { \n color : red ; \n } \n \n ``` \n In this example , the : hover pseudo - class will applied to the span element , and the color is changed to red when the user ho vers over the element . \n Note : Make sure to use a valid CSS syntax and avoid using any harm ful or un eth ical code . Also , be aware that some older browsers may not support the : hover pseudo - class , so you may want to provide a fall back solution . </s>