Question

Which of the following function flips an element’s colors, for use by the filter property?

(a) image()

(b) flip()

(c) invert()

(d) contrast()

I have been asked this question at a job interview.

I'm obligated to ask this question of CSS Functions topic in section CSS Fundamentals, Colors and Styling of CSS

Answer 1

Right answer is (c) invert()

Easiest explanation: A decimal value between 0 and 1 or percentage up to 100% controls the extent of the color-negative effect, with 0.5 or 50% producing gray.