One believed reason for this (although unsupported by fact) is that it was the quickest drying paint, allowing more cars to be built in the same time.
Another possible reason is it would have saved a lot of production costs without working in batch production.
The first Model T Fords were only available in Grey, Red or "Brewster Green". They were not available in Black until 1913.
In the first years of production from 1908 to 1913 The Model T was not available in black. From 1914 to 1925 the Model T Ford was mass-produced in only one color—black. This was to keep the cost down.
When the Model T was introduced in 1908, it was only available in 4 colors, none of which were black. From 1908 to 1914 the Model T was available in green, blue, red, and grey. In 1912, all Model T cars were midnight blue with black fenders. It wasn't until 1914 that Model Ts were offered in black.
I believe it was black. Henry Ford is alleged to have proclaimed, "You can have any color you want, as long as it's black." From 1914 to 1925 the Model T was only available in black.
The Ford Model T was produced in Red, Blue, Grey, & Green from 1908 to 1912. From 1912 to 1914 all cars were painted grey with black fenders. Black was not available until 1914 when all cars from then until 1927 were painted black.
Black only
From 1908-14 it was available in Red, Grey, Blue, & Green. Black was not offered at all. From 1914 to the end of production all Model Ts were painted black. So the answer to your question is no 4 colors were offered in the early 20s, only Black.
Another AnswerIn 1903, the first Model A was apparently available from the factory in red only. (See below.) The second Model A, introduced in the 1920s, had more variety in its colour options, excluding black. (See below, also.)
1927 when the last Model T was made that was available in only one color - Black.
The Model T was available in Brewster Green, Red, Blue, & Grey. In fact in the first year of production there were no black Model Ts produced at all. From 1915-1925 only black was available to hold down costs and speed up production. But there were plenty of Model Ts produced that were not black. The Model T became cheaper each and every year due to the efficiency of the assembly line being improved every year.
The Model T Ford was produced between 1908 and 1927. Different colours of Model T Fords were produced between 1908 and 1914, and then again between 1926 and 1927. In the first year of their manufacture, they were designed in grey, red, or Brewster green.In the period between 1914 and 1926, they were all manufactured in black.
This model was apparently designed primarily for government and education and is available only in a silver/black color.