There are several synonyms for the word "rose-coloured" that can be used to describe a situation or perspective that is overly optimistic or hopeful. Some of these include "idealistic," "naive," "positive," or "optimistic." Additionally, the term "rosy" can be used to describe a optimistic outlook or situation. Other synonyms include "optimistic," "hopeful," and "positive," which can all be used to convey a similar sense of positivity and hopefulness. However, it is important to recognize that being too rose-coloured or optimistic about a situation can also lead to a lack of realism, which can ultimately be harmful.