Why should you choose a monitor with Delta E≦2?

When purchasing professional electronic equipment, it is recommended to buy devices with a Delta E value of less than 2, because the colors rendered under this condition appear identical to the original colors to the human eye.(Source)

Viewsonic, a world-renowned monitor manufacturer, explains on its official website:
Why you should choose a monitor with Delta E ≤ 2: When purchasing professional electronic equipment, it is recommended to buy devices with a Delta E value of less than 2, because under this condition, the displayed colors are indistinguishable from the original colors to the human eye.(Source)

Source of relevant information：

Lab Color Space

Color differences

CMYK Image Color Difference: Buyer Expectations vs. Printer Capabilities

Delta E 101

Color management and color difference control in printing

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