I agree with Charles' suggestion to do this with a two column table, however there is another alternative worth noting.

With non-tabular content, you can drag a vertical selection by holding the Alt key and click&drag with the mouse. You can then apply the colour to that selection

I do question the use of colour with your checkboxes though. Isn't the point of a checkbox that it can be checked or not checked? Changing its colour doesn't usually mean the same thing as checking the box. And checking each box is not normally done with a single action - if it was then there wouldn't be a point in having lots of boxes when only one would be necessary.

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Andrew Lockton
Chrysalis Design, Melbourne Australia