Ruby Rd Clothing Co

I love the Ruby Rd clothes! But, I have had a problem with some black pants I purchased at a Belk's store in FL. I have washed them about four times now and it seems like a reddish/orange color is bleeding through. I have several other pants in different colors and have had no problems with the color. I do not use bleach, use Tide Free detergent. The pants look almost brown now instead of black. Any suggestions? I love this line of clothes because most of them wash beautifully, wear forever and fit just right. thanks,