No, aloe is not supposed to be yellow in color. Aloe vera plants typically have green leaves, and any yellowing may indicate a problem with the plant's health.
Aloe is a short-stemmed succulent plant with thick fleshy green
leaves. The leaves have a serrated margin with spiny teeth like
margins. The flowers are pendulous, tubular and yellow in
color.
Aloe vera has many health benefits and used in many skin care
products due to its healing properties.