Use this in value field:

javascript:gs.dateDiff(gs.now(), current.u_suspend_till.getDisplayValue(), true) <86400

Use this in style field:

background-color:yellow

javascript:gs.dateDiff(gs.now(), current.opened_at.getDisplayValue(), true) > 86400

background-color:red

javascript:gs.dateDiff(gs.now(), current.opened_at.getDisplayValue(), true) < 0

background-color:tomato