Why do some stars appear brighter than others?

It makes sense to think that the hotter the star is, the more light it will actually put out. From coolest to hottest, star colors are Brown, Red, Orange, Yellow, Yellowish White, White, Blue White, and Blue. Brown being the coolest, blue being the hottest. So therefore, Brown would be the least luminous, blue would be the brightest. You will also see stars of the same color that look brighter or dimmer. This also has to do with the distance from us that the star is. The further away, the less light will travel close enough for us to see.