Alternative to White-Out
In multiple instances, I have made a mistake in pen on a colored or decorated piece of paper. White-Out would be too obvious because the page wasn't white to begin with. What can I do/use/lifehack that can solve this?
I need more context. Permanent pen, ballpoint, or other? Viewed by whom - in what setting? Is this artwork, a label on a file drawer, a wrapped gift? One-time use or repeatedly viewed by hundreds of people?
In a school homework worksheet setting, writing utensil: Anything that can't be easily and readily erased, i.e. not a pencil
I've used three techniques in the past for this kind of thing.
Wipe it off. If the surface is relatively non-absorbant, then a wet-wipe should be able to lift the pen off. I've saved miswritten birthday cards in the past this way.
Abrasion. If you're writing on unwaxed paper or card, and have used a biro instead of a fountain pen, you can (very carefully) scrape away the top layer of paper immediately where you have written on. Use anything hard that won't leave a mark, and go slow! The ink will be removed with the top layer. Practice this technique before using on something important!
Paint. If you have access to a decent painting set, you can effectively make your own White-Out in whatever colour you need. Ideally, you need acrylics - it'll give you an finish very similar to White-Out. Water colours won't cut it.
If you use one particular colour often, consider investing in a POSCA paint marker. They come in a large range of colours, and will allow you to effortlessly cover over any mistakes as easily as White-Out.