Added more tests

Color.go

@@ -4,9 +4,6 @@ import (
 	"fmt"
 )
 
-// Value is a type definition for the data type of a single color component.
-type Value = float64
-
 // Color represents an RGB color.
 type Color struct {
 	R Value
@@ -14,11 +11,6 @@ type Color struct {
 	B Value
 }
 
-// RGB creates a new color with red, green and blue values in the range of 0.0 to 1.0.
-func RGB(r Value, g Value, b Value) Color {
-	return Color{r, g, b}
-}
-
 // Print writes the text in the given color to standard output.
 func (c Color) Print(args ...any) {
 	if !Terminal {