Umbro has apologised for any offence caused by Linfield's new away kit.
The purple and orange jersey has caused a stir after it was described as having a "similarity to UVF colours".
The shirt - which is now on sale at the club's online store - was launched last week and has been widely debated on social media.
Linfield hit back last week saying they "robustly and vigorously" reject any allegations that they were influenced by any "other entity" when designing the kit.
Meanwhile, Umbro said the design was "based purely on guidance from the club".
An Umbro spokesperson said: "Kit designs are a collaborative process and this kit was based purely on guidance from the club.
"We apologise unreservedly for any offence we have unintentionally been party to.
"Furthermore there will be no promotion of this product on any Umbro channels."
Alliance MP Stephen Farry urged the club to "rethink" the kit, saying it would "risk offence" if unchanged.
He wrote on Twitter: "This may well be purely coincidental and unintentional, but I do think a rethink would be appropriate.
"The similarity to UVF colours is too striking. Many other colours and designs are available. Why leave any ambiguity and risk offence to so many?"
Meanwhile, Linfield's chairman Roy McGivern hit back, saying the club would not be changing the away-kit colours.
Responding on Twitter, McGivern said: "Is this where we are as a society when an elected MP thinks that ordinary every day colours can be owned or monopolised by a paramilitary organisation?"
In a statement posted on their website, Linfield said: "Earlier this week Linfield FC revealed images of the club's new Away kit for the 2020/21 season.
"The design has met with approval from large numbers of supporters but unfortunately and sadly, there have been certain suggestions from a small number from outside the club which this club can not ignore.
"For the avoidance of all doubt, the design is of a football kit for a football club and any similarity / likeness / resemblance with any other design used by any other entity is totally coincidental and entirely unintentional.
"Any allegation or inference to the contrary is robustly and vigorously rejected by this club which prides itself on being inclusive, open to all and representative of all.
"Linfield FC is totally opposed to all forms of bigotry, prejudice, violence and discrimination."
