bug: Since 0.15.3 EZA_COLORS's size coloring tweaks stopped working

You can see here I set the user color and the file size (for small files) using `EZA_COLORS` to the same red color.

In the first test, using eza 0.15.2 both the user and the file size are correctly red.
In the second test, using eza 0.15.3 the user is still red but the file size is the default green color.

Working version, nixpkgs hash: `H=657f8ce31927e61a2f2ec1174b882c453e95b38f`
Not working version, nixpkgs hash: `H=7d38cab61f2f72c62d4a943c29662d62df44afcd`
```sh
nix eval "github:nixos/nixpkgs/$H#eza.version"
nix run "github:nixos/nixpkgs/$H#eza" -- -l some/path
```

---
The 0.15.3 is the version that introduced the `--color-scale` option, which I'm NOT using here.