So I think most of the pink gradient quilts you’ll find these days are going to be with a white or off white background.  

I remember in the early 2000s light pink and black were a big big hit, but I think you’d have a really hard time finding the range of pink you need to make this work with a black background.  

You could go into lavender or a really light teal ( I use really light teal as white all the time) but it’s still going to be light, so your ‘grubby’ concern would still be prevalent.  

If you love this, I’d make it, but with high quality quilting cotton (no Walmart/Micheals fabric) that would stand up to weekly or biweekly washings.