"From magenta walls to pink carpets, this week Colin and Justin have gone clash crazy: don your sunglasses, we're in for a colourful time."

Earls Court arena is bursting at the seams and we're darting from interview to interview, delighted with the response our Cave House has received.

The event's been open for several hours but the tempo hasn't dipped one iota. And then it happens. Time stands still for a moment as the House Doctor - and queen of cream - Ann Maurice arrives.

A vision in shades of soft caramel and taupe she catches our eye and delivers (in that American drawl for which she's become famous) a sentence that sends shivers down our spines. "Boys, I'm loving the cave but we SO have to talk about your other room sets"

Oh dear. Madam has spotted our welcome area - the two zones which meet guests when they enter the arena. Yes, she's clocked our colour scheme and wants to talk.

Ushering us aside she whispers in our ear: "You've pulled it off, guys, but by the skin of your teeth. That much colour is normally enough to send me into a coma"

Phew. We thought we were in REAL trouble. An endorsement from Ann - especially one where colour is concerned - is triumph indeed. But what was it, precisely, that attracted Ann's relative approval?

Well you know, another low key project courtesy of J and C. Low key, that is, if you consider vivid Magenta and black to be an understated combo.

And blimey, have we gone to town. Which brings us to today's subject matter - clashing colours. Our message is simple; if you play any scheme carefully enough you can get away with design murder.

Not that we're recommending home homicide in so far as decorating is concerned but our latest mantra is - for this season anyway - anything goes.

That's why we're currently searching for a new take on avocado bathrooms for our London apartment. Strange as it sounds we're planning a tongue in cheek Japanese-style bath clad in teak with a matching pod shaped loo and sink. Finding it, however, is proving to be a nightmare. Answers on a postcard, please, to J and C

We're also throwing our colour counsel to the wind by assembling, for a private client, a living room that's the brightest shade of yellow you've ever seen. And yes, we know that we've said in these very pages that too bold a yellow can be unworkable.

What we're doing to temper our scheme, however, is adding vibrant zesty orange upholstery (in for a penny - in for a pound) and sleek zebrano timber furniture to pull it together.

So let your imagination run wild. Do what you will. Start with paint (it can be easily remedied if you panic later) and build your confidence slowly. Before you know it you'll be clashing away wonderfully with all manner of Designers Guild fabrics and Osborne and Little wallpapers.

There'll be no stopping you. Give yourself an inch and you'll take a mile of brightly hued textile. You might even decide that our Ideal Home Show marriage of vibrant pink and black is a winner.

So where were we? Oh yes - our room sets.

We love them and indeed the marriage of pink and black seems to be stopping everyone in their tracks. The initial stage of our master plan, however, was the hardest part of the whole design.

At the eleventh hour we came together with the Lancashire-based company who explained their bespoke dye service - you choose any colour, however extreme - and they do the rest. And the results are nothing short of staggering.

Perfect pink, with a luxuriant dense pile now sits at the base of our OTT Ideal Home Show bedroom. And jet black floors in the living room. Perfect.

The next stage of our plan was upholstery and again, try as we might, we couldn't find anything off the shelf that had similarly enormous pink proportions. Which is when we realised we'd have to have our requirements specially manufactured for the event. And so it came to pass that we called our people at George Maxwell who tailor-made for us a pair of Vivienne Westwood-esque Queen Anne-inspired chairs.

Upholstered in jet velvet and magenta they're divine. The addition of pink strip lighting by Habitat and pop art pics (of yours trulies) by Snappy Snaps continues to set the scene.

And as we always say, "the devil is in the detail". With this maxim in mind we added pattern to our walls and, drawing inspiration from hand-blocked wallpaper, we took a more economical route and did it ourselves courtesy of a motif from The Stencil Library, based in Stocksfield, Northumberland.

In the black room we used magenta paint to add detail and in the room painted pink we used black as our accent, creating the perfect flip reversal. Is it any wonder then, that as we escorted Lady Rothermere on a guided tour, she said that our work was inspirational!

However, there was one dissident, an elderly gentleman who approached us as we were leaving the event. While chatting, he commented that, as far as Med styling was concerned, he hadn't quite "got" our pink and black scheme.

We explained our take on the region was admittedly slightly radical and we'd drawn inspiration from something far sexier than the package holiday face of Mediterranean living.

Our rooms relived the exotic Med of days gone by. A combination of Monaco Grand Prix, the Amalfi Coast and Pierre Cardin they're fast paced and dynamic, a redolent echo of days gone by.

Justin and Colin's Med is all about recollections of an elegant era of fine hotels and Coco Chanel and, while perfectly at odds with what you might expect, it'll take your breath away.

Indeed, if you think you know the Mediterranean think again. And if you do make it down to Earls Court, remember to take your sunglasses.