Yes, it is possible for Irish people to have olive skin, although it is less common. The term "olive skin" typically refers to skin that has a slightly yellow or greenish undertone, which can give it a warm, golden hue. This skin tone is more commonly found in people with Mediterranean, Middle Eastern, or North African ancestry, where it may be an adaptation to high levels of sun exposure.
However, skin tone is determined by a complex interplay of genetics and environmental factors, and can vary widely even within the same ethnic group. Irish people can have a range of skin tones, from very fair to darker with warm undertones, depending on their ancestry and other factors such as sun exposure.
It's important to note that skin tone is just one aspect of skin type, and that individuals with different skin tones may have different skincare needs and concerns. Regardless of skin tone, it's important to take care of your skin by protecting it from the sun, keeping it hydrated, and using skincare products that are appropriate for your skin type and concerns.