The Sync Services sync schema for iCal does not store a color for each calendar (assigning a color apparently wasn't part of the original iCal spec). This means that we can't sync calendar colors with iCal which means it's entirely possible that your 'Work' calendar in iCal might be blue and your 'Work' calendar in SOHO Organizer might be red. This is not a deficiency in SOHO Sync. Calendars colors simply are not supported by Apple's Sync Services in Mac OS X 10.4.