Logos

You probably know this: the YouTube logo.  It uses a red box around part of the word to emphasize it.  The boz itself is lighter at one corner, making it seem almost 3D.  By contrast, the black letters are flat and the white letters look more like they have been cut out of the red box than stuck on top.  There is also a small shadow under the box and the black letters.

This is the Mozilla Firefox logo.  It uses plain shapes without outlined and shading to make an interesting logo.  The top of the earth is lighter, which gives you the impression that it is round.  The fox's for fades from dark to light at the tips.  The fox's back is shaded, which makes it seem like light is shining down on it.  The shadows on the edge make it seem raised off the background.

This logo uses a combination of flat letters and highlighted shapes.  The highlights  make the shapes seem to stick out.  The big turquoise section especially reminds me of a water drop.

This logo's black background  condtasts sharply with the red, orange and blue.  The logo includes a picture of Mars behind the blue, red and orange swirl.  The title of the logo is done in the same colours as the swirl.  The swirl combines blue and red and highlights both in places, adding lighter sections that seem raised out from the rest.

This logo uses the colours of the five olympic rings at the bottom to form the inukshuk design.  The title is placed in the middle, emphasizing it.

This logo uses the same picture of the earth as the Firefox logo, because both are done by the same company.  In this logo, the fennec fox's head is placed in front of the earth.  It is also done without outlines, making it seem smoother.  The top of the logo is lighter, as if the light on it is coming from above the logo.

This logo uses shading to make the letter seem rounded and sticking out a bit.  The yellow loop is slightly transparent and does not go all the way around the letter.  Some edges of the letter are darker, making it appear to be 3D.

This logo uses shading and angles to make the globe seem round.  The globe is also split into puzzle pieces and the top few pieces are missing.  Part of the other side of the globe can be seen through the top, adding to the idea that it is a sphere, not just a circle.  The logo is completely colourless.