There are no descenders
on this line
Some interesting things:
- if the divs are block elements, they are not placed next to each other even though they would fit
- remove the empty bit between the red and blue block by removing the whitespace between the divs in the HTML code
- the section has an area for descenders even though the text has none
- give the divs a vertical-align value 'bottom' to remove the little bit of space below them