Complement and invert functions in SASS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the complement() function do in Sass?

The complement() function returns the opposite color on the color wheel. It helps create contrasting colors by flipping the hue by 180 degrees.

beginner

How does the invert() function work in Sass?

The invert() function reverses the red, green, and blue values of a color, producing its negative. It keeps the alpha (transparency) the same.

intermediate

What is the difference between complement() and invert() in Sass?

complement() changes the hue by 180° on the color wheel, creating a color opposite in tone. invert() flips the RGB values to create a photographic negative of the color.

beginner

Write a Sass code snippet to get the complement of #3498db.

$color: #3498db; $complement-color: complement($color); // $complement-color will be a color opposite to #3498db on the color wheel

beginner

What visual effect does using invert() on a color create?

Using invert() creates a color that looks like a photographic negative. Light colors become dark, and dark colors become light, but the transparency stays the same.

What does the Sass complement() function do?

A Inverts the RGB values of a color

B Changes the alpha transparency

C Returns the color opposite on the color wheel

D Lightens the color by 50%

complement() flips the hue by 180 degrees to get the opposite color on the color wheel.

Which Sass function creates a photographic negative of a color?

A invert()

B darken()

C lighten()

D complement()

invert() reverses the RGB values, producing a negative of the color.

If you apply invert() to a fully transparent color, what happens to the transparency?

A It becomes fully opaque

B It stays the same

C It becomes half transparent

D It becomes fully transparent black

The alpha (transparency) value remains unchanged when using invert().

Which function would you use to find a color that contrasts well with a given color?

A desaturate()

B invert()

C saturate()

D complement()

complement() gives a color opposite on the color wheel, which usually contrasts well.

What happens to the hue when you use complement() on a color?

A It shifts by 180 degrees

B It shifts by 90 degrees

C It stays the same

D It becomes grayscale

The hue shifts by 180 degrees to get the complementary color.

Explain in your own words how the complement() and invert() functions differ in Sass.

Think about color wheel vs RGB values.

Describe a real-life situation where you might use the complement() function in a web design project.

Think about how opposite colors catch attention.