Originally based in Aldridge, Bluechilli have since moved to bigger premises in Birmingham due to demand and have already worked with the club on a graphic design level.
The company, which started up in 2009, also joined forces with the club as part of our 2019/20 Early Bird Season Ticket campaign.
The deal will now see them involved in designing all of the Saddlers' marketing activities, including fixtures, match hospitality, official matchday programme, events and matchday graphics for the club's digital and social channels.
Walsall FC Marketing Manager Daniel Clarke, speaking via the club's official website, said; "I've known the team at Bluechilli for a long time now. As a club, we have worked well with them over the years and I was keen to bring them in as Official Design Partner.
"We are always keen to develop working relationships with local companies and Bluechilli are a prime example of this. I'm looking forward to working with Bluechilli on this new deal and I'm excited to see what this deal brings."
Karl Wheeler, Creative Director of Bluechilli, added; "I am very proud that Bluechilli are now the Official Design Partner of Walsall FC. We have worked closely with the club in the past and I am delighted that we will be able to build on that relationship moving forward."