Final answer:
The word 'light' in the sentence functions as an adjective to describe a pale shade of the blue color.
Step-by-step explanation:
In the sentence, "I love the light blue color on your shirt," the word 'light' is used as an adjective to describe the shade of the blue color. It indicates that the blue is pale or not dark, much like how light from the sun illuminates and brightens things. Colors often carry emotional significance or evoke certain feelings, and light blue can bring to mind the sky on a clear day, serenity, or a sense of peace. Moreover, the sentence itself shows how color can be used to express personal taste and emotion, appreciating a particular hue for its aesthetic value.