1990 Fleer Baseball Cal Ripken Jr. #624 Variation/Error Purple/Blue Background MLB Hall of Fame Baltimore Orioles VERY RARE Brand New. The error is a purple background on the front of the card as seen pictured in photo one on the left side. The corrected version has a blue background on the front of the card as seen pictured in photo one on the right side. You get both the error and corrected cards. You get two cards. USPS First Class Mail. Free Shipping