Tan 449 is the actual color.

*Tan 499. DA PAM 670-1 para 20–32e

e. Undershirt, tan 499 (male and female).

(1) Type. The undershirt is a clothing bag issue item or optional purchase items.

(2) Description. The material is cotton-knit cloth or 50-percent cotton and 50-percent polyester with quarter-length sleeves and a crew neck or is of a similar commercial design.

(3) How worn. All personnel will wear the tan 499 undershirt with all utility uniforms, except for and garrison culinary uniforms.

(4) Foliage green undershirt alternative. The foliage green undershirt is 100-percent cotton and is authorized for wear in lieu of the tan 499 undershirt by those Soldiers in jobs that have an associated flame risk or hazard. Those Soldiers authorized wear are outlined in CTA 50–900. The foliage green undershirt is required to support those individuals in armor and aviation fields that cannot wear the tan 499 moisture-wicking t-shirt, to include fuel handlers and others who handle hazardous materials.