Many colorblind people aren't even aware they have a "color-vision deficiency, " as it's officially known, unless they apply for a job that requires precise color recognition.

WSJ: New Outlook for Colorblindness

Be aware, though, that as the leaves cook, they quickly lose their bright-green color.

WSJ: Renee Erickson's Roast Salmon With Saut��ed Radishes and Sorrel Cream