Your information is outdated. Items are hardware-colored, so they don't have colors in their names anymore, not since late January. The use of the sweeper was phased out a couple of months ago.
To make any color of stained glass, including the "light", "faint", and "pastel" colors, just make exactly that color of dye and punch some super glow glass with it.
After 0.4.17 goes out, I'll re-institute the old recipes that let you directly craft super glow glass plus dye to get stained glass of that color (but using the same hardware coloring as we use now).
In the meantime, dye crafting is explained in detail in the Unified Dyes usage guide (third "spoiler"):
viewtopic.php?f=11&t=2178