its not “just” white; any “luminous”, "cold’’ or “crisp” color also has the same luminance as white, these are:
Luminous Violet
Cold Berry
Luminous Blue
Luminous Azure
Cold Slate
Luminous Slate
Crisp Yellow
Crisp Lime
Luminous Moss
Luminous Green
Crisp Green
Cold Lime
Cold Viridian
Cold Teal
Crisp Teal
Luminous Viridian
Luminous Turquoise
Luminous Tan
Crisp Tan
Cold Tan
Luminous Taupe
Luminous Red
White
Luminous Yellow