Color is fast, but for precaution dip into salty water for few time. Do not dip with other cloth and avoid deep wash with too much detergent. There is no guarantee on color. Some colors like indigo (natural color) etc will loose some but do not make cloth look like old or faded. Gold/silver color may fade nahi hoga due to sweating so use those dresses in proper condition and always give for dryclean.
Some color in picture may appear lil different due to lighting, flash, camera quality and also your device color setting. Which is almost impossible to control, that is why we use unedited pics.
So you can use it without any worry.
For custom tailoring orders we stitch according to measurement but leave some margin...
Most of our products you can easily do hand wash but For precaution dip into salty water for few time....