"cf" display a color text of standard output.

cf.go

// Usage:
// cf {color} {text}
// colors => black, red, green, yellow, blue, magenta, cyan, white
package main

import (
        "fmt"
        "flag"
)

func main() {
        flag.Parse()
        if(flag.NArg() == 2){
                switch color := flag.Args()[0]; color {
                case "black":
                        fmt.Printf("\x1b[30m%s\x1b[0m\n", flag.Args()[1])
                case "red":
                        fmt.Printf("\x1b[31m%s\x1b[0m\n", flag.Args()[1])
                case "green":
                        fmt.Printf("\x1b[32m%s\x1b[0m\n", flag.Args()[1])
                case "yellow":
                        fmt.Printf("\x1b[33m%s\x1b[0m\n", flag.Args()[1])
                case "blue":
                        fmt.Printf("\x1b[34m%s\x1b[0m\n", flag.Args()[1])
                case "magenta":
                        fmt.Printf("\x1b[35m%s\x1b[0m\n", flag.Args()[1])
                case "cyan":
                        fmt.Printf("\x1b[36m%s\x1b[0m\n", flag.Args()[1])
                case "white":
                        fmt.Printf("\x1b[37m%s\x1b[0m\n", flag.Args()[1])
                default:
                        fmt.Println("selected color\nblack\nred\ngreen\nyellow\nblue\nmagenta\ncyan\nwhite\n")
                }
        }else{
                fmt.Println("Usage:\n")
                fmt.Println("cf {color} {text}")
                fmt.Println("selected color\nblack\nred\ngreen\nyellow\nblue\nmagenta\ncyan\nwhite\n")
        }
}