Summer house paint ideas: the best interior colours for a calm, sunny space

Whether you're using your summer house as a garden retreat, a creative studio, or simply somewhere to escape with a cup of tea, the right interior paint can make all the difference. While the weather may change, the mood of your space doesn’t have to — and thoughtfully chosen colours can keep that light, joyful, summery feeling going all year long.

If you're looking for summer house colours that bring in warmth, relaxation, and a natural feel, we've rounded up some beautiful options. These paints are designed for interior use only — perfect for the inside walls of your summer house, but not intended for outdoor or exterior surfaces.

Here are some of our favourite colours for summer houses, inspired by nature, sunshine, and the slower pace of summer living.

Soft, sunny yellows

Nothing says “summer” quite like yellow — and it's an ideal choice for bringing warmth and joy into your summer house.

Beehive – our beautiful golden yellow paint – is a subtle take on a sunny day: soothing, earthy, and full of natural character. It evokes sun-drenched hayfields, warm sand, and those golden late-afternoon rays that stretch long across the floorboards. It's a cheerful but grounded choice for any summer house interior.

Because of its soft and natural in tone, this striking butter yellow paint works beautifully across seasons – brightening winter days and glowing warmly in summer.

The calming, pastel Spring Flowers, meanwhile, is a light yellow paint that brings a light brightness to any room. This colour works really nicely in south room as it adds warmth with the sunlight. It's also a perfect option to be paired with a deeper contrasting colour to bring in even more warmth.

Earthy, Mediterranean reds

Reds aren’t just for winter. For a relaxed, sun-baked feel, try a muted, earthy red — like our Sahara Dust. This earthy red paint is inspired by terracotta walls warmed under Mediterranean skies, and it brings that same mellow heat indoors.

This gentle red hue is deeply grounding and surprisingly versatile. It adds warmth and calm to any room – perfect for a summer house lounge area or reading nook.

Moroccan Market, on the other hand, is a deep red paint that brings a warm feel to any room, its rich hues giving that beautiful pop of colour. This colour reminds us of rich sunsets on those perfect late summer evenings.

Garden-inspired greens

Greens instantly connect your summer house to the garden outside – and our Olive Tree paint is especially good at blurring the line between indoors and out.

This soft, light olive green paint contains subtle beige tones, making it calming, neutral and incredibly adaptable. It’s one of the best colours for summer houses that are used for relaxation or quiet creativity, evoking tall grasses, hedgerows, and peaceful countryside.

If you're after summer house paint ideas that feel natural and timeless, green-beige paint colours like Olive Tree are a strong choice.

Alternatively, Bird Song is the perfect colour to lift light into a room. Its soft tone allows it to be very versatile and work in many spaces, whether it be a kitchen, bathroom or childrens bedroom. Bright rooms with lots of sunlight really makes this green pastel paint come into its own.

Painting your summer house interior? Here’s what you should know

All of the colours above are designed for interior use only. They are not suitable for external walls, fences, or garden buildings exposed to the elements.

Our mindful, UK-made paint range is crafted with low VOC content, virtually no odour, and safe ingredients that make painting easy and enjoyable. Every tin is recyclable, and each colour is carefully designed to promote calm, comfort, and connection to nature.

So, whether you’re choosing soft neutrals or embracing bold colour, choose what makes you feel good. The best summer house paint ideas are the ones that help you create a space you love to spend time in – whether it's mid-July or the middle of winter.