Crawley's assistant manager Anthony Williams hailed a "good team performance" after his side secured their first home league win in nine weeks.
An early goal from defender Mark Connolly and late strikes by Billy Clarke and Nicky Adams gave the Red Devils their first victory in four games against struggling Colchester.
Williams was especially pleased with the manner of the performance on a difficult, heavy pitch at the Broadfield Stadium.
And the Welshman hopes that the conditions may work to his side's advantage when Barclays Premier League Reading visit in the FA Cup third round on Saturday.
Williams said: "On our pitch you have to play in certain areas, that's why the lads love to play away from home because they can play football. You would think that Reading may not fancy it, but they can be direct."
Crawley have already entertained Bolton and Swansea in the Capital One Cup earlier this season and Williams is relishing another big occasion.
He added: "It's nice to relax from the league and maybe the pitch will make it a bit of a leveller. There's no pressure in a way, but we've got to perform."
Eighth-placed Crawley have not recorded a clean sheet at the Broadfield Stadium since their previous home league win against MK Dons on April 23 and Williams felt his men should have been completely in control early on.
He said: "It was a good team performance and we got our just reward. We could have been further ahead after the start we made, and Colchester didn't really threaten in the second half."