Male Enlisted Blue Mess Jacket

Sir, the lapel color for all NCO's is Dark Blue. I invite you to reference section 16-7 of DAPAM 670-1, where it depicts enlisted personnel as wearing a "dark blue" satin lapel.
The satin is a very dark blue, which is also the same authorized satin that is used on AG, JAG, & GO lapels. The dark blue satin can be confused with black, until held side by side the Chaplain satin lapel.

The interior lining of the coat is black. The lapel satin is midnight blue for NCO. It is a very deep midnight blue, that it almost appears black.

Only one CSIB can be worn at one time. I have included the regulation from DA PAM 670-1 below for reference.

Paragraph 20-17.e.(5): The combat service ID badge is worn on the wearer’s right side. The combat service ID badge is a pin-on badge authorized to be worn on the Army service/dress uniform and the mess and evening mess uniforms, in place of the SSI–FWTS. Personnel may wear only one combat service ID badge at a time. This badge is only authorized as a nonsubdued metal badge. This badge is not authorized for wear on combat or utility uniforms.