Fix color issues on switching to crossterm

Not exactly sure what is going on. Default colors are set as dark
varients in crossterm and for example we have to use DarkBlue instead
of Blue when using crossterm.

src/color.rs

@@ -243,12 +243,12 @@ fn to_content_style(ls: &lscolors::Style) -> ContentStyle {
         },
         lscolors::style::Color::Fixed(n) => Color::AnsiValue(*n),
         lscolors::style::Color::Black => Color::Black,
-        lscolors::style::Color::Red => Color::Red,
-        lscolors::style::Color::Green => Color::Green,
-        lscolors::style::Color::Yellow => Color::Yellow,
-        lscolors::style::Color::Blue => Color::Blue,
-        lscolors::style::Color::Magenta => Color::Magenta,
-        lscolors::style::Color::Cyan => Color::Cyan,
+        lscolors::style::Color::Red => Color::DarkRed,
+        lscolors::style::Color::Green => Color::DarkGreen,
+        lscolors::style::Color::Yellow => Color::DarkYellow,
+        lscolors::style::Color::Blue => Color::DarkBlue,
+        lscolors::style::Color::Magenta => Color::DarkMagenta,
+        lscolors::style::Color::Cyan => Color::DarkCyan,
         lscolors::style::Color::White => Color::White,
     };
     let mut style = ContentStyle::default();

src/color/theme.rs

@@ -169,9 +169,9 @@ impl Theme {
             user: Color::AnsiValue(230),  // Cornsilk1
             group: Color::AnsiValue(187), // LightYellow3
             permission: Permission {
-                read: Color::Green,
-                write: Color::Yellow,
-                exec: Color::Red,
+                read: Color::DarkGreen,
+                write: Color::DarkYellow,
+                exec: Color::DarkRed,
                 exec_sticky: Color::AnsiValue(5),
                 no_access: Color::AnsiValue(245), // Grey
             },