Wild vs farmed salmon, an illustration

Which is which? I thought the pinkish color wasn’t natural?

A carotenoid called astaxanthin causes the pinkish orange color, and is found in crustaceans and plankton. The color of salmon flesh changes depending on how much the fish consumed. Farmed salmon are fed astaxanthin, which results in healthier fish and pink flesh as consumers expect. So an unusually pale salmon is likely wild, with a non-crustacean diet or a genetic mutation which prevents the salmon from processing the astaxanthin.
Source: https://www.scottishsalmon.co.uk/facts/faqs/fish-health-welfare/why-is-salmon-pink