I don't think it will affect salvation. It is ignorance, for sure, but it's one easily corrected by actually reading the Bible.
But observe that every race does this. Native Americans paint frescoes of Jesus like He was a Native American. In Asian churches He looks like an Asian. And black people like to paint Jesus black. White people painted Him white. What is my point. That everyone imagines a face of a person they haven't seen with a skin color they are used to the most. I'm saying it's not racially motivated and it is not malignant. If I am black and someone tells me a story about some person and I don't know how they look, I will be imagining a black person throughout the story, because that's how the faces of my immediate family look like and what I'm used to. Same if you ask people to imagine a fruit most will imagine apple, if you ask them to imagine a tool a big majority will say they imagined hammer. Same goes for an artist painting a fresco.
(church in Osaka, Japan, with a very Japanese looking Mary)
(Ethiopian Orthodox church frescoes)
(from a church in Beijing)
(Indian nativity fresco)
(traditional Orthodox frescoes, this one is in Russia, but also in my country and all Eastern Orthodox countries, represent Biblical characters with diverse tones of olive, some even very dark, which is correct as representation of Semitic skin color. And this is the iconographic canon in Orthodox church, colors vary slightly, it goes from golden/olive/ruddy (most commonly) to brown, I've never seen a pasty Jesus in an Orthodox church in my life.
Problem is that - and I might get hate for this, but pretty much this is American believers doing this - they only know a bit of Catholic tradition not even whole Catholic tradition and then act like they know all about most branches of Christianity or what "white men" do, and they go off the rails based on poor information and bias.)
(14th century Ethiopian church)
(The Apache Christ on the Mescalero Apache reservation)
(South Korean church mosaic)
(some more Ethiopian Christian art)
And I can go on and on, but I think I proved my point... I suggest American believers to get educated, no offense meant, Catholicism isn't the whole Christianity and is barely half of the early church, and not just in this area, American believers are still stuck in Reformation movement in ways, this goes for many areas of discussion and on many topics people just kneejerk to everything... Sorry if this came across as aimed at you, I did not follow all your posts to know your full stance on this matter, it's rather intended to a lot of people, I am a bit tired of watching people raving in utter ignorance about both basic human psychology and Christian iconography...