fix: use ANSI colors codes instead of RGB (#14665)

* chore: add command for showing colors

* fix: use ANSI color codes instead of RGB

* feat: add '--no-color' flag

* fix: revert colors

* chore: change colors

* fix: update golden files

* fix: replace blue with brightBlue

* fix: drop '> ' for unfocused prompts

* fix: run 'make fmt'

* chore: allow disabling color with env flags

* fix: apply fixes from feedback

* fix: run 'make gen'

* fix: refactor janky code

* fix: re-add public function

* fix: re-add init for non-color tests

* fix: move styles to 'init' that can be

* fix: stop overwriting entire DefaultStyles

* fix: make code and field obey --no-color

* fix: rip out '--no-color' due to race condition

We still support `NO_COLOR` env variable through termenv's
`EnvColorProfile`. The reason for the race condition is that
`DefaultStyles` is a global that we shouldn't mutate after `init`
is called, but we have to mutate it after `init` has ran to have
serpent collect the cli flags and env vars for us.

* fix: apply nit

* fix: simplify code && hide command

* fix: newline shouldn't be themed

* fix: appease the linter

cli/cliui/cliui.go

@@ -37,17 +37,21 @@ var (
 )
 
 var (
-	Green   = Color("#04B575")
-	Red     = Color("#ED567A")
-	Fuchsia = Color("#EE6FF8")
-	Yellow  = Color("#ECFD65")
-	Blue    = Color("#5000ff")
+	// ANSI color codes
+	red           = Color("1")
+	green         = Color("2")
+	yellow        = Color("3")
+	magenta       = Color("5")
+	white         = Color("7")
+	brightBlue    = Color("12")
+	brightMagenta = Color("13")
 )
 
 // Color returns a color for the given string.
 func Color(s string) termenv.Color {
 	colorOnce.Do(func() {
-		color = termenv.NewOutput(os.Stdout).ColorProfile()
+		color = termenv.NewOutput(os.Stdout).EnvColorProfile()
+
 		if flag.Lookup("test.v") != nil {
 			// Use a consistent colorless profile in tests so that results
 			// are deterministic.
@@ -123,42 +127,45 @@ func init() {
 	DefaultStyles = Styles{
 		Code: pretty.Style{
 			ifTerm(pretty.XPad(1, 1)),
-			pretty.FgColor(Red),
-			pretty.BgColor(color.Color("#2c2c2c")),
+			pretty.FgColor(Color("#ED567A")),
+			pretty.BgColor(Color("#2C2C2C")),
 		},
 		DateTimeStamp: pretty.Style{
-			pretty.FgColor(color.Color("#7571F9")),
+			pretty.FgColor(brightBlue),
 		},
 		Error: pretty.Style{
-			pretty.FgColor(Red),
+			pretty.FgColor(red),
 		},
 		Field: pretty.Style{
 			pretty.XPad(1, 1),
-			pretty.FgColor(color.Color("#FFFFFF")),
-			pretty.BgColor(color.Color("#2b2a2a")),
+			pretty.FgColor(Color("#FFFFFF")),
+			pretty.BgColor(Color("#2B2A2A")),
+		},
+		Fuchsia: pretty.Style{
+			pretty.FgColor(brightMagenta),
+		},
+		FocusedPrompt: pretty.Style{
+			pretty.FgColor(white),
+			pretty.Wrap("> ", ""),
+			pretty.FgColor(brightBlue),
 		},
 		Keyword: pretty.Style{
-			pretty.FgColor(Green),
+			pretty.FgColor(green),
 		},
 		Placeholder: pretty.Style{
-			pretty.FgColor(color.Color("#4d46b3")),
+			pretty.FgColor(magenta),
 		},
 		Prompt: pretty.Style{
-			pretty.FgColor(color.Color("#5C5C5C")),
-			pretty.Wrap("> ", ""),
+			pretty.FgColor(white),
+			pretty.Wrap("  ", ""),
 		},
 		Warn: pretty.Style{
-			pretty.FgColor(Yellow),
+			pretty.FgColor(yellow),
 		},
 		Wrap: pretty.Style{
 			pretty.LineWrap(80),
 		},
 	}
-
-	DefaultStyles.FocusedPrompt = append(
-		DefaultStyles.Prompt,
-		pretty.FgColor(Blue),
-	)
 }
 
 // ValidateNotEmpty is a helper function to disallow empty inputs!