Yes, the T4069, JC-1 product is also supplied in the Mitochndria Stain kit, CS0390. Both are prepared at 1 mg/mL in DMSO resulting in a red solution. Slight variations in color may be considered normal and the result of lot-to-lot variability. Marked differences in color should be discussed with Technical Service.
Should this be the case, please navigate to the link https://www.sigmaaldrich.com/techservice, click on "Product Technical Inquiries" under the Products Section and respond with all the required information so that a member of the Technical Service team can reach out to assist further. Thank you.