If you’re planning to use Dulux Broom Half for your next home project, this post is for you! Today, I’m going to walk you through its undertone, how it behaves in different room orientations, and which whites to pair it with for a cohesive look.

I’m Bozica, a qualified interior designer and colour specialist, and if you're building or renovating, it's crucial to understand your paint’s undertones, lighting, and fixed elements before making any final decisions.

🎨 About Dulux Broom Half

• Undertone: Grey with a soft blue base

• LRV (Light Reflectance Value): 70

• Category: Cool grey, suitable for interior walls

This is a grey with a gentle blue undertone, making it a calming and versatile neutral for modern homes. With an LRV of 70, it’s bright enough for open-plan living areas and spaces where you want a light, airy feel—but with a bit more depth than a standard white.

🧪 How to Test Paint Colours the Right Way

I see a lot of people making the same mistake: using tiny paint swatches or testing colours on the floor. But here’s what you should do:

• Use A4-sized paint samples

• Test colours vertically on your wall, not on the floor

• Always place colours next to Dulux Vivid White to reveal the undertone

This method helps you clearly see how your chosen colour compares to a true white—and whether it’s warm or cool.

🪟 Don’t Forget Fixed Elements!

Before falling in love with any paint colour, ask yourself:

• What colour are my window frames?

• What undertones are in my flooring or tiles?

• What colour is my kitchen cabinetry?

These are fixed elements, and they must harmonise with your wall colour. If your fixed elements don’t work with blue-grey undertones, Dulux Broom Half is not the right choice for your space.

✅ Best White Paints to Pair with Dulux Broom Half

1. Lexicon Half

A beautiful cool white with a subtle blue undertone. It creates a soft contrast and blends smoothly with Broom Half.

2. White on White

Slightly deeper and crisper than Lexicon Half. This combo creates a bit more contrast but still stays in the cool-toned family.

3. Vivid White

A pure, clean white with no undertone. Perfect for architraves, skirtings, doors, and ceilings—it makes mid-tone walls pop with a fresh, sharp contrast.

4. Lexicon Quarter (My Favourite)

Cool, bright, and harmonious with Broom Half. It has just enough contrast and keeps your space looking soft, modern, and balanced.

🧭 How Dulux Broom Half Looks in Different Rooms

Natural light direction changes how paint behaves throughout the day. Here's how Broom Half performs depending on orientation:

• North-facing rooms: Bright, soft, and slightly warm

• South-facing rooms: Can look flat and cool—add artificial light to warm it up

• East-facing rooms: Bright and fresh in the morning, deeper and moodier in the afternoon

• West-facing rooms: Absolutely stunning! The afternoon sun brings this colour to life with rich warmth

📌 Key Interior Tip

Paint colour is the last thing you choose, not the first. Your colour selection should come after you’ve picked tiles, flooring, benchtops, and other fixed elements.

If you’re not sure where to start or how to test properly, I’ve created resources to guide you:

🎁 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.