"Rose-colored glasses" is a commonly used idiom that means looking at things in a positive or overly optimistic way, ignoring the negative aspects. There are several other synonyms for this idiom such as "happy-go-lucky," "blissfully unaware," "optimistic," "idealistic," and "naive." Additionally, "positive attitude," "bright outlook," and "sanguine perspective" are also used as synonyms for the phrase. However, it is important to note that while having a positive outlook is beneficial, ignoring the reality of a situation can lead to negative consequences. Therefore, it is essential to maintain a balance between optimism and realism.