ACA Color Theory and Management

Question 1

Which color mode uses Red, Green, and Blue channels and is best suited for digital screen display?

Accepted Answer

RGB

Answer

RGB is an additive color model designed for screen-based display, mixing light to produce colors.

Question 2

What does the 'K' stand for in the CMYK color model?

Accepted Answer

Key (Black)

Answer

K stands for Key (Black), the fourth ink used in four-color printing to add depth and detail.

Question 3

Which color model is considered device-independent and is commonly used as a universal reference color space?

Accepted Answer

LAB

Answer

The LAB color model is device-independent and encompasses all colors visible to the human eye, making it ideal as a universal reference.

Question 4

What term describes the complete range of colors that a device or color space can reproduce?

Accepted Answer

Gamut

Answer

Gamut refers to the full range of colors that can be produced or represented by a specific device or color space.

Question 5

When converting an image from RGB to CMYK in Photoshop, why might some colors appear duller after conversion?

Accepted Answer

Some RGB colors fall outside the CMYK gamut

Answer

CMYK has a smaller gamut than RGB, so vivid RGB colors that fall outside the printable range must be approximated with duller equivalents.

(ACA) Adobe Certified Associate Practice Test