What skin condition is related to an outbreak of patches that are red in color?

Pityriasis rosea is characterized by an outbreak of patches on the skin that are often red in color. This condition typically starts with a single large patch known as a "herald patch," followed by smaller patches that spread across the body, often following the lines of cleavage. The patches can sometimes be itchy and may have a scaly appearance. The exact cause of pityriasis rosea is not fully understood, but it is thought to be related to a viral infection.

In contrast, melasma involves brown or grayish-brown patches on the skin, usually related to hormonal changes and sun exposure, rather than red patches. Telangiectasia refers to small, dilated blood vessels on the skin's surface, creating a red appearance, but these are not typically described as patches. Scleroderma is a chronic condition that leads to the hardening and tightening of the skin and connective tissues, which may involve skin changes but doesn’t primarily manifest as red patches. Thus, pityriasis rosea is the most accurate answer due to its distinct presentation of red patches.