I'll be discolouring you'll be discolouring she'll be discolouring we'll be discolouring you'll be discolouring they'll be discolouring
Future perfect
I'll have discoloured you'll have discoloured she'll have discoloured we'll have discoloured you'll have discoloured they'll have discoloured
Future perfect continuous
I'll have been discolouring you'll have been discolouring she'll have been discolouring we'll have been discolouring you'll have been discolouring they'll have been discolouring
I'd be discolouring you'd be discolouring she'd be discolouring we'd be discolouring you'd be discolouring they'd be discolouring
Past
I'd have discoloured you'd have discoloured she'd have discoloured we'd have discoloured you'd have discoloured they'd have discoloured
Past continuous
I'd have been discolouring you'd have been discolouring she'd have been discolouring we'd have been discolouring you'd have been discolouring they'd have been discolouring