Code:
<p><span style="color: red;">Red</span><span style="color: green;">Green</span><span style="color: blue;">Blue</span><span style="color: yellow;">Yellow</span></p>
You can use the names :
black
silver
gray
white
maroon
red
purple
fuchsia #FF00FF
green
lime
olive
yellow
navy
blue
teal
aqua
for any other shade, you will need to code the RGB values