Warm & Cool Colour Explorer
Enter any colour, or try one of the presets, to see whether it reads as warm or cool — and why — using the traditional artist's colour wheel convention.
Choose a Colour
Or try a preset:
Temperature Result
HEX: #AE4F26
Hue: 18°
Temperature: Warm
Hues within 90 degrees of red (0 degrees) — reds, oranges, yellows and red-violets — are treated as warm on the traditional artist's colour wheel.
How to Use the Warm & Cool Colour Explorer
Enter a HEX colour code, try one of the six preset swatches, or use the Random Colour button. The tool reads the colour's hue and classifies it as warm or cool, with a short explanation of why.
How the Classification Works
The tool converts your colour to Hue, Saturation and Lightness and looks at the hue alone. Hues within 90 degrees of red (0 degrees) — reds, oranges, yellows and red-violets — are treated as warm. Hues within 90 degrees of cyan (180 degrees) — yellow-greens, greens, blues and blue-violets — are treated as cool. This is a traditional, widely taught artist's colour wheel convention rather than a strict scientific measurement, and very low-saturation, near-grey colours may not have a strong warm or cool feel in practice even though the tool will still classify their hue.
Using Colour Temperature in Your Artwork
Warm colours tend to feel energetic and tend to visually advance, while cool colours tend to feel calm and recede into the background. Artists often use this to guide the eye: a warm focal point against a cool background can help a subject pop, while an overall warm or cool colour scheme can set the mood of an entire piece, such as a warm sunset or a cool twilight scene.
Examples
Frequently Asked Questions
What makes a colour warm or cool?
By traditional artist colour wheel convention, reds, oranges and yellows are considered warm, while greens, blues and violets are considered cool. This tool classifies a colour as warm or cool based on where its hue sits on the colour wheel.
How does this tool decide warm or cool?
It converts your colour to Hue, Saturation and Lightness and checks the hue. Hues within 90 degrees of red are classified as warm, and hues within 90 degrees of cyan are classified as cool.
Is warm and cool an exact scientific measurement?
No. Colour temperature in this artistic sense is a traditional, widely taught design convention rather than a strict scientific measurement, and perception can vary. This tool applies a common, consistent rule so you get the same answer every time.
What about grey or very desaturated colours?
Very low-saturation, near-grey colours may not have a strong warm or cool feel in practice, even though the tool will still classify their underlying hue as warm or cool.
Why do some hues feel warm and others cool?
Warm hues (reds, oranges, yellows) are often associated with fire, sunlight and heat, while cool hues (greens, blues, violets) are often associated with water, sky and shade.
How can I use colour temperature in my artwork?
Warm colours tend to feel energetic and visually advance, while cool colours tend to feel calm and recede. Artists often place a warm focal point against a cooler background to help a subject stand out.
Can I try preset colours instead of typing a HEX code?
Yes. Six preset swatches are provided so you can quickly explore different warm and cool examples without typing a HEX code.
Does the tool save my colours?
No. All calculations happen in your browser and nothing is saved or sent to a server.
Is this tool free to use?
Yes, the Warm & Cool Colour Explorer is completely free to use, with no account, sign-up or download required.
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