What is Color Temperature: How to use Warm and Cool Colors

Today we will further define color temperature and give some examples of how to use it in paintings.

Color temperature is nothing more than a way to group colors and describe how they relate and interact.

Color temperature falls into two categories—warm and cool. Cool colors are often closer to blue and purple. And warm colors are closer to red and yellow.

An example of how colors are commonly grouped into warm and cool colors

They were likely put into these categories because warm colors evoke feelings of fire and passion while cool colors evoke feelings of ice and tranquility.

But these color categories play a far bigger role than helping you decide what color to paint fire and ice.

Warm and cool colors can be used to turn form (see the previous article), create moods, and suggest space and distance.

Warm and cool colors can be used to make small turns in form while still keeping values close together. This helps simplify values and maintain a strong value structure.

Color temperature can also suggest moods. Want to paint a sunset or the feeling of golden hour? Use more yellows and warm colors in your highlights.

Landscape oil painting of a desert sunset and cactus
Example of one of Bryan’s landscapes that exemplify how warm highlights create the feeling of golden hour

One of the most common ways to use color temperature is for atmospheric perspective in landscape painting.

You will often find cooler colors like blue and purple in the background and warmer colors like red and yellow in the foreground.

Landscape oil painting of blue mountains green trees and green grass
Example of a landscape oil painting by Bryan, demonstrating atmospheric perspective

The main takeaway is that warm and cool colors give us a convenient way to describe color groups and can create specific effects in paintings.

It’s not a hard science and there are no rules to describe which colors fall into which categories.

It’s helpful to think of a color as being warmer or cooler in relation to a nearby color, rather than thinking of a color as inherently warm or cool.

How do you use color temperature in your paintings? Feel free to comment or ask a question. I’d love to help you on your painting journey.

Stop back tomorrow when we will discuss edges.

Until then, just keep painting.

Bry

How to Turn a Form With Color Temperature

Today let’s discuss how to turn a form with color temperature rather than with value alone.

First let’s define turning a form. A form in art jargon is a three dimensional object, as opposed to a shape, which is two dimensional. See the example below.

Example of a circle and sphere to illustrate shape and form in visual arts​
Example of a circle and sphere to illustrate shape and form in visual arts

So turning a form often involves making a shape three dimensional, by adding values or temperature shifts.

Often, highlights are warmer and shadows are cooler, especially in landscape painting. In the example below, the sphere appears to be three dimensional with light on the right and shadow to the left.

A sphere with yellow highlights and purple shadows to illustrate how color temperature can turn a form
Example of how color temperature alone can suggest a three dimensional form

You can use this knowledge to create form in your paintings with color before resorting to value alone.

In the example below, you can see warm colors in the highlights and cooler colors in the core shadow of the apple.

The form of a red apple suggested with warm yellow highlights and a cooler core shadow​
The form of an Apple suggested with warm highlights and a cooler core shadow

This technique is also used in portrait painting quite a bit, where using color temperature can suggest very subtle shifts in the form and skin tone.

As an exercise, you can try painting some spheres using just yellow, blue, and red. Avoid using black and white for shadows and highlights. This can help with mixing skills and with getting a feel for the effects of color temperature.

Do you use color to turn your forms? Feel free to leave a comment or question. I’d love to help you on your painting journey.

Stop back tomorrow (and every day) for more tips and lessons.

Tomorrow we will discuss color temperature further and what warm and cool colors actually are.

Stay inspired,

Bry