another option but I think mosaic of colour... is also possible

The next pod will be a riot of colour, costumes and make-up. ... This pod will be a riot of colour, with the performers using coloured ribbons for movement and ... from the days of slavery and the celebration of the joy of freedom. ...
www.capetowncarnival.com/?q=con,7,Carnival Weekend

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Note added at 22 mins (2010-12-07 01:28:14 GMT)
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BLACK ORPHEUS holds up amazingly well, its rich color and incessant samba beat ... "The carnival scenes are exhilarating, a riot of color, music and movement. ... color, the excitement of samba and the accessible joy of a fabled city, ...
www.cduniverse.com/productinfo.asp?pid

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Note added at 23 mins (2010-12-07 01:29:16 GMT)
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Experience Trinidad Carnival. There is no experience on earth to compare with ... to experience an opportunity to learn about truth, joy and the art of living. ... In the riot of colour, sound and movement that ensues can be found the ...
www.infohub.com › ... › Trinidad and Tobago

Another meaning of "mosaic" is "composition."

I referenced the link on dictionary.com.

Thanks

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Note added at 35 mins (2010-12-07 01:40:54 GMT)
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Or, since it's describing a celebration, you could also say "A mixture of happiness, color, and movement."

Just another option. I know fusion is not exactly the same as mosaic but in this context I think it is adequate.

I prefer medley or fusion over mosaic. For alegria, you could use joyfulness, delight, cheer, festivity, and on and on... Good luck!

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Note added at 1 hr (2010-12-07 02:41:14 GMT)
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You're welcome. It seems Trisha and I have similar thoughts. She beat me by a few seconds!

You could replace "joyful" with "festive".
Stained-glass windows of the Arts and Crafts period by Frank Lloyd ... the new glass-fronted balconies reveal a panoply of color, form, and brilliance. ...
www.metmuseum.org/works_of_art/introduction.asp?...1 - En caché; In a panoply of colour, light and ... Inevitably at a Festival like this you will interrogate what you do, and why and how you do it. ...
nayd.ie/files/Learn.pdf; THE FESTIVE FACTORY. Circus skills and puppetry combine to ..... panoply of colour, movement and sound. ..... From Brazilian to Mexican and also with ...
www.cathysclowns.com.au/.../Cathys Clowns Listing - Oct 200...

Tesselation - formed of small, flat pieces of stone of various colours (as used in mosaic).
I also like the 'elation' part of the word, it brings festive to the mind.
Also note that you should use "color" or "colour" depending of the target audition, US or UK English