Here's a few notes & links I put together for my ceremony next year:
http://www.squidoo.com/Handfasting-Wedding-Ritual
The Colours Of Handfasting
In the traditions of Celtic handfasting the couple's wrists are bound together
using ribbons of thirteen different colours.
Each colour has it's own special meaning:
Red: passion, strength, lust, fertility
Orange: encouragement, attraction, kindness, plenty
Yellow: charm, confidence, joy, balance
Green: finances, fertility, charity, prosperity, health
Blue: tranquility, patience, devotion, sincerity
Purple: Power, piety, sanctity, sentimentality
Black: strength, wisdom, vision, success
White: purity, concentration, meditation, peace
Gray: neutrality, canceling, balance
Pink: unity, honor, truth, romance, happiness
Brown: earth, grounding, talent, telepathy, home
Silver: treasure, values, creativity, inspiration
Gold: energy, wealth, intelligence, longevity
http://www.officiantguy.com/handfastingceremony.html