Colourless glass lets light pass through it unhindered. This glass is transparent.
Cellophane and coloured glass are also transparent because you can see through them. However, the colour of what you see is changed.
If you look through red cellophane, everything on the other side appears to be shades of red. If you look through green glass, everything appears green.
Green cellophane will only allow green light to pass through it. The cellophane absorbs other colours of light.
For example, green light will not pass through red cellophane. The green light is absorbed by the red cellophane. However, green light will pass through green cellophane.