- [ ] attr() - [x] blur() - [x] brightness() - [ ] calc() - [ ] circle() - [x] contrast() - [ ] counter() - [ ] counters() - [ ] cubic-bezier() - [ ] drop-shadow() - [ ] ellipse() - [x] grayscale() - [x] hue-rotate() - [ ] hwb() - [ ] image() - [ ] inset() - [x] invert() - [x] linear-gradient() - [x] opacity() - [x] perspective() - [ ] polygon() - [ ] radial-gradient() - [x] repeating-linear-gradient() - [ ] repeating-radial-gradient() - [x] saturate() - [x] sepia() - [ ] url()