Dopamine Designs for Happy, Feel-Good Spaces
Welcome to Rainbow Shaker!

Press and TV

Colour Your Home Happy™

The Course to create YOUR Happy Home

Ready to create a home that radiates happiness, energy and personality 🌈?

Colour Your Home Happy is a fun, interactive online course that helps you break free from design rules and embrace colour with confidence. Through dopamine décor, fearless styling, and hands-on creative exercises, you’ll learn how to transform your space into a bold, joyful reflection of YOU.

The Podcast for Bold, Joyful Interiors

Tired of neutral, uninspiring interiors? So am I!

In the Colour Your Home Happy podcast, I help you gain the confidence to use colour fearlessly and design spaces full of joy, energy, and personality. From dopamine décor tips to expert interviews, this podcast will inspire you to create a home that makes you smile every day.

Services

Looking to transform your space into something truly extraordinary? Whether it’s a joyful home that reflects your personality or a commercial space that wows your clients, I’ll guide you every step of the way.

Perfect for homeowners, renters, and bold businesses who want to transform their space into a vibrant, story-driven haven.

A styled space can speak louder than words! Whether it’s for a branding campaign, magazine feature, or real estate listing, I’ll style your space to create unforgettable visuals that capture attention and tell your story.

Perfect for creative brands and agencies who need shoot-ready spaces with unique styling that makes a visual impact.

Ready to design a set that tells a story and leaves a lasting impression? From TV and film sets to movie clips, I specialise in creating immersive environments that are as functional as they are stunning.

Perfect for production teams, content creators, and event organisers looking to design immersive sets full of story, charm, and colour.

Recent Colourful Transformations

Hospitality + Branding | Paris

A whimsical Paris hotel reimagined with murals, florals, and a storytelling soul.

Residential | Kids | Vilnius (100% remote)

A Montessori-inspired bedroom made to grow with your little explorer.

Workspace | Second-hand | Paris

A sustainable office redesign that sparks joy, focus, and team spirit.

Clapham Project

(Coming Soon)

Residential | Family Home | London

Colourful family-home design by Rainbow Shaker, London

Discover

A vibrant London family home where Bauhaus geometry meets Miami joy.

Hi! I'm Justine, Your vibrant designer…

Bold colour, fearless design, feel-good spaces.

I’m a London-based interior and set designer creating bold, joyful spaces across the UK, France, and remotely. Whether it's a dopamine décor home, a playful set, or a standout commercial project, I help people and brands design interiors that reflect their true personality—with zero beige in sight.

I swapped rocket science 🚀for riotous colour—leaving my engineering career behind to launch Rainbow Shaker, a creative studio where structured problem-solving meets bold, story-driven design full of personality and unapologetic fun.

You might’ve seen me on Channel 4’s The Big Interiors Battle, or heard me on my podcast Colour Your Home Happy, where I help you ditch dull, trust your instincts, and create a home as bold as you are ✨!

Justine Guillermou in vibrant, colourful outfits pose in a stylish, eclectic room with brick walls, plants, and colourful décor. One wears a pink and yellow floral dress, and the other wears a pink velvet suit.

What my clients say about me

FREE QUIZ

Colourful Memory Palette

Need help finding inspiration for your space? Your home should be a reflection of your unique experiences and memories. Take the quiz to take a trip around the world and explore this special connection!