Paint Mixing maths mission

Quick answer

You can mix paint to make new colours using ratios. If you know how much red and blue to mix, you can make purple. If you mix 2 parts red with 1 part blue, you get a specific shade of purple.

Learning outcome

By the end of this page, you will be able to mix paint using ratios to create new colours and understand how equal parts make different shades.

• You can use a simple ratio like 2:1 to mix two colours
• You can see how changing the ratio changes the colour
• You can work out how much of each colour you need
• You can create your own paint colour combinations

Why this matters

Paint mixing is a fun way to learn about ratios, which are used in cooking, building, art, and science. When you mix paint, you are using maths to make beautiful colours. Understanding ratios helps you share things fairly, follow recipes, and solve puzzles.

From Art Class to Construction Projects, ratios are everywhere. If you know how to mix paint, you can make your own custom shades and create unique artwork.

How it works

When you mix paint, you use ratios to decide how much of each colour to use. A ratio shows the relationship between two amounts. For example, if you use 2 parts red and 1 part blue, the ratio is 2:1.

Here’s how it works:

1. Decide how much of each colour you want
2. Use a ratio to guide how much of each colour to mix
3. Mix the paint together
4. Try different ratios to make new shades

Let’s say you want to make purple. You might use 2 parts red and 1 part blue. That’s a 2:1 ratio. If you use 4 parts red and 2 parts blue, that’s also a 2:1 ratio because 4 divided by 2 equals 2, and 2 divided by 1 equals 2.

Examples you can see

Imagine you are painting a picture of a sunset. You want to make a nice orange colour. You mix 3 parts yellow with 1 part red. That’s a 3:1 ratio.

Try this at home:

• Take 2 red paint blobs and 1 blue blob
• Put them in a cup
• Mix them together
• See what colour you get!

You can also try making a 4:2 ratio of red to blue. That’s the same as 2:1 but with more paint. You can use a small spoon to measure and pour.

Try it as a mini adventure

Adventure: The Paint Mixing Mission

You are a paint artist on a mission to make the perfect shade of green. You have:

• 3 parts yellow
• 1 part blue

That’s a 3:1 ratio. But what if you want to make more paint? You decide to make 12 parts total. How much yellow and how much blue do you need?

Let’s work it out:

1. 3 parts yellow + 1 part blue = 4 parts total
2. You want 12 parts total
3. 12 divided by 4 = 3
4. So you need 3 times more paint
5. 3 parts yellow × 3 = 9 parts yellow
6. 1 part blue × 3 = 3 parts blue

Now you have 9 parts yellow and 3 parts blue. Mix them and see what colour you get!

Challenge: Try making a 5:2 ratio of red to green. How much of each do you need if you want to make 14 parts total?

Common mistakes

• Mistake: Mixing paint without using a ratio
• Why it happens: Not knowing how much of each colour to use
• Fix: Start with a simple ratio like 2:1 and count the parts

• Mistake: Thinking 4:2 is different from 2:1
• Why it happens: Not understanding that ratios can be simplified
• Fix: Divide both sides by the same number to get the simplest ratio

• Mistake: Using too much of one colour
• Why it happens: Guessing instead of counting
• Fix: Use a measuring cup or spoon to keep track

Parent and carer guide

Help your child understand ratios by:

• Using simple words like “parts” instead of “ratio”
• Letting them measure and mix paint themselves
• Practising with small amounts first
• Encouraging them to guess what colour they will get
• Not worrying if the mix is not perfect at first

What to say:

• “How many parts of red do you think you need?”
• “What happens if we use more yellow?”
• “Let’s try making a 3:1 ratio together!”

What not to do:

• Don’t rush or say “hurry up”
• Don’t correct every mistake
• Don’t make it feel like a test

Paint mixing is a great way to explore maths and creativity. Let your child enjoy the process and learn through play.

Practice questions

1. What is the ratio of 6 parts red to 3 parts blue?
2. If you use 4 parts yellow and 2 parts blue, what is the ratio?
3. You want to make 10 parts of a 3:2 ratio. How much of each colour do you need?
4. How much red and blue do you need for a 5:1 ratio if you want 12 parts total?
5. If you have 8 parts of a 2:3 ratio, how much of each colour do you have?

Answers:

1. 6:3 = 2:1
2. 4:2 = 2:1
3. 6 parts red, 4 parts blue
4. 10 parts red, 2 parts blue
5. 3.2 parts red, 4.8 parts blue

FAQ

What is a ratio?

A ratio is a way to show how much of one thing there is compared to another. For example, 2:1 means 2 parts of one thing to 1 part of another.

Can I use ratios for anything else?

Yes! Ratios are used in cooking, building, science, and art. They help you share things fairly or make the right amount of something.

How do I know if my ratio is correct?

Check if the parts can be simplified to the same number. For example, 4:2 simplifies to 2:1, so they are the same ratio.

What if I want to make more paint?

Multiply each part of the ratio by the same number. If you have a 2:1 ratio and want 6 parts total, multiply each part by 2 to get 4:2.

Is paint mixing safe for kids?

Yes, if you use non-toxic, child-safe paint and work in a well-ventilated area. Always check labels and ask an adult for help.