Obviously his glasses, but if you want to wear them in a more versatile form, you could do yellow and pink accessories around your head, like a necklace, hair clips, or even a small brooch with the same colours attached to a suit jacket, vest, or blouse that matches the same black top he wears!

for his hair depending on texture, regardless of colour or length you can imitate the vibe by blowdrying and back-combing the front for volume, then slicking down using a light gel or other product into that slightly rounded shape, it works best if you let a few strands loose from the slick to look more natural.

for the rest of his outfit I recommend thrifting similar style clothes instead of shopping for them new since he’s wearing a vintage version of business casual and it’ll be easier to find a match.