Many customers are puzzled by this question. Clear glass is indeed mostly clear, but it has a minor green tint when looking at it head on. This green tint is caused by iron in the material used to make the glass. Looking out a window, this tint is hardly noticeable. In a tabletop, looking from the side, the tint is magnified. While one could argue that this may be attractive, if you do not like the green tint you should consider “low iron” glass which is ultra-clear. This difference is quite significant when viewing low iron side by side with traditional clear glass.
Below: Standard glass to the left, low iron to the right. Both have finished polished edges.
There is no reason you cannot step out of the box and use a tinted or acid washed (frosted) glass as a glass top to create your own look.