Sounds like you want to do something in muted neutrals like Japanese Taupe fabrics. Pinterest has loads of neutral quilts you can look at for inspiration.
Here are Japanese Taupes
https://www.pinterest.com/search/pin...4933&term_meta[]=japanese%7Cautocomplete%7Cundefined&term_meta[]=taupe%7Cautocomplete%7Cundefined&term_meta[]=quilts%7Cautocomplete%7Cundefined
And this search was just neutral quilts
https://www.pinterest.com/search/pin...yped&term_meta[]=neutral%7Ctyped&term_meta[]=quilts%7Ctyped'