Haha thank you, but vividness like this is a rare occurrence. If you'll notice it happened like two months ago and is my most vivid out of the past year or two.
It wasn't really a sepia filter, like the sky was a normal shade of blue. It just felt sepia-...y. I guess haha. My dreams generally have slightly altered or stylized colors though to answer your question.
Do you dream in sepia a lot? I've never really had dreams through color filters, though I imagine it'd be a very different experience.
Although my lucid dreams are frequent, I almost feel a loss in hope to ever be able to have dreams as vivid as that....