When changing the formatting of a spreadsheet to make it more readable, you should use light blue text on a bright blue background.

No you should not do this, as it will make it look unclear

Explanation:

At first, you should not select the bright colors for the background. And still, however, if you have selected the bright blue color as background then you need to select some other color for text, and not the light blue color for text, as light blue color over the bright blue color is certainly going to look quite unclear, and you will not be able to read properly. Thus, it will be better if you choose a light blue color as the background and white color for the text.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?