Will my blue hair fade if i take a shower, but not shampoo it?

i only dyed the bottom half. should i just wash the top part? or....just whatever i guess. any tips?Will my blue hair fade if i take a shower, but not shampoo it?
Water makes it fade. But I guess it won't fade as much if you just let the water and shampoo run through it vs. rubbing it directly with shampoo.Will my blue hair fade if i take a shower, but not shampoo it?
it will fade a little. With a color like blue it puts a LOT of color in and it's not going to penetrate your cortex like a permanent color does. You WILL see some blue in the shower, but it's supposed to happen. How much it fades depends a lot on what you used and whether/how much you pre-lightened it. Make sure in any case to use COLD water to prevent fading. If the rest of your hair is darker, but a cooler shade you can put some of the semi-permanent hair color in with your shampoo to add cool tones throughout your hair without turning the rest of it blue. Or you can get a color support shampoo for cool brunettes such as bumble and bumble. It adds cool tones, but doesn't deposit color. If your hair is blond there is pretty much no way to prevent the blue from bleeding and turning the blond a pale blue. My advice is just to keep extra product on hand and re-dye it every 2 weeks or so (IF it doesn't contain ammonia!!!!) to keep it vibrant. Don't shampoo more than twice a week and make sure if your aren't using a color support shampoo to use a color SAFE one such as l'oreal vitimino color.
color will fade no matter what u do,it just happens,if u dont want to wash your hair,then u should keep it pulled back while u shower and dont let it get wet
Depends on which product you used.
please wash your hair!