Dishwasher, tempered glass and limescale
Coloured glass asks no more care than clear glass, as long as it is coloured through. Every series here is dishwasher safe. Do not wedge them tightly against each other in the rack, because glasses knocking together eventually cause small chips along the rim, which are more visible in coloured glass than in clear.
Tempered glass, such as the French tumblers, is clearly more impact resistant than ordinary soda-lime glass and therefore sensible around children or outdoors on the terrace. Coloured crystal glass is thinner and finer at the rim and belongs on a laid table indoors. If a glass takes on a dull haze after long dishwasher use, that is almost always limescale and not loss of colour; washing it once by hand in water with a little vinegar takes it off.