Pearl Beige is the standard interior color for pickup cabs in 1954.
All parts were Pearl Beige, except for the Steering wheel, steering column/mast-jacket, and 3-speed column-shifter mechanism.
The "CHEVROLET" letters on the dash were white, and there were black center sections on the dash vertical grill-bars to the left and right of the radio-grill bars.
Here is a Dupont Paint sheet for 1954.Will you have a painted grill and bumpers? If so, ask, if you want color information (it's all on that paint link). Also, if you need paint codes, PPG can provide all the colors (
information on colors, codes, and obtaining modern formulas/codes are available in this Tech Tip).
Tim