<img src="images/arch_bluev2.png" title="arch_blck logo" alt="arch_blck" width="80" height="80">
There must have not been white background. Instead it should have a transparent as the image itself is transparent and is of png type.
If the image is the same as the one you had uploaded in post, than the background is not really transparent. It just looks like. I quickly transform this to be transparent.