If you’re planning to use Dulux Broom Half for your exterior, this blog post is for you. I’ll walk you through what undertone this colour has, how it behaves outside, and the best colours to match with it—all based on years of experience helping homeowners make confident colour choices.

I’m Bozica, a qualified interior designer and colour specialist. If you’re building or renovating, you’ll find plenty of colour scheme help here to avoid costly mistakes and create a cohesive, timeless look.

🎨 What You Need to Know About Dulux Broom Half

• Undertone: Grey with a soft blue base

• LRV (Light Reflectance Value): 70

• Category: Cool grey

This is a cool, fresh grey with a blue undertone, making it a fantastic neutral choice for exterior colour schemes. With an LRV of 70, it has just enough depth, while still looking bright outdoors—typically 2–3 shades lighter in natural light.

💡 Pro Tip: Colours always appear lighter outdoors, so what seems like a mid-grey inside will often look like a soft white or pale grey on your facade.

🏡 How to Use Dulux Broom Half on Your Home Exterior

This colour works best on:

• Weatherboard homes

• Rendered Hebel homes

• Contemporary and coastal styles

Because of its clean blue-grey base, it creates a crisp, elegant feel—perfect for both traditional and modern homes.

🪟 Matching the Right Whites and Greys

The secret to a successful DIY colour selection is sticking to one undertone family. Since Dulux Broom Half is a grey with a blue undertone, here are the best colours to pair with it:

✅ Windows & Trims

Choose a crisp white for your windows. It adds clean contrast and keeps the scheme fresh. This is especially important because your windows are visible from both inside and outside the home.

If you have window mouldings or trims, use a slightly deeper cool grey with a blue undertone to frame them beautifully.

✅ Feature Colour

Want to add a feature on a column or upper level? Stick with a darker grey with a blue undertone—you’ll maintain a monochromatic, elegant look without introducing clashing colours.

Never mix in greys with green or violet undertones—it will disrupt the harmony of your exterior.

✅ Garage Door & Front Door

Keep it simple and cohesive—use white for both. This keeps the look fresh and timeless.

🧱 Fixed Elements to Watch For

Your tiles, driveway, and even fence colour must also work with the undertone of your main wall colour. If you choose Dulux Broom Half, then your exterior hard finishes should also sit in the cool grey-blue family.

💡 Bring your painted sample when shopping for outdoor tiles or concrete finishes to ensure the undertones align. This one step alone can save you thousands in regret!

🎁 Free Downloads to Help You Choose the Right White

Still unsure? Before you even pick up a brush, make sure you actually understand how to choose white paint and neutrals for your home. I’ve created two free downloads that will walk you through:

📌 Read This Before You Renovate or Build
📌 Understand the 4 Types of White + How to Choose the Right One for Your Home

They’ll help you avoid costly mistakes and feel more confident in your decision-making.

🎓 Want Step-by-Step Colour Selection Help?

If you're ready to learn how to choose white paint, test undertones, and create a full neutral colour scheme for your home, then join my online course. It's designed for homeowners who want to get it right the first time—without needing a designer.

👉 Check out the course here
It’s packed with visual guides, video tutorials, and includes access to a private Facebook group where you can ask me questions directly.