Light blue is a cool tone that, when paired with other cool tones like lilac, works to create a tranquil, restful space. However, it also makes a great backdrop for punchier accent hues, like hot pink ...

You may know them by the acronym ROY G BIV. Together, they make the white light you see when the sun -- the main source of blue light-- is shining. Fluorescent and LED (light-emitting diode) light ...