diff --git a/color_test.go b/color_test.go
index bbe07f1..cc0ab55 100644
--- a/color_test.go
+++ b/color_test.go
@@ -7,8 +7,6 @@ import (
 )
 
 func TestSetColorProfile(t *testing.T) {
-	t.Parallel()
-
 	tt := []struct {
 		profile  termenv.Profile
 		input    string
@@ -85,3 +83,145 @@ func TestHexToColor(t *testing.T) {
 		}
 	}
 }
+
+func TestRGBA(t *testing.T) {
+	tt := []struct {
+		profile  termenv.Profile
+		darkBg   bool
+		input    TerminalColor
+		expected uint
+	}{
+		// lipgloss.Color
+		{
+			termenv.TrueColor,
+			true,
+			Color("#FF0000"),
+			0xFF0000,
+		},
+		{
+			termenv.TrueColor,
+			true,
+			Color("9"),
+			0xFF0000,
+		},
+		{
+			termenv.TrueColor,
+			true,
+			Color("21"),
+			0x0000FF,
+		},
+		// lipgloss.AdaptiveColor
+		{
+			termenv.TrueColor,
+			true,
+			AdaptiveColor{Dark: "#FF0000", Light: "#0000FF"},
+			0xFF0000,
+		},
+		{
+			termenv.TrueColor,
+			false,
+			AdaptiveColor{Dark: "#FF0000", Light: "#0000FF"},
+			0x0000FF,
+		},
+		{
+			termenv.TrueColor,
+			true,
+			AdaptiveColor{Dark: "9", Light: "21"},
+			0xFF0000,
+		},
+		{
+			termenv.TrueColor,
+			false,
+			AdaptiveColor{Dark: "9", Light: "21"},
+			0x0000FF,
+		},
+		// lipgloss.CompleteColor
+		{
+			termenv.TrueColor,
+			true,
+			CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+			0xFF0000,
+		},
+		{
+			termenv.ANSI256,
+			true,
+			CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+			0xFFFFFF,
+		},
+		{
+			termenv.ANSI,
+			true,
+			CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+			0x0000FF,
+		},
+		// lipgloss.CompleteAdaptiveColor
+		// dark
+		{
+			termenv.TrueColor,
+			true,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#0000FF", ANSI256: "231", ANSI: "12"},
+			},
+			0xFF0000,
+		},
+		{
+			termenv.ANSI256,
+			true,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#FF0000", ANSI256: "21", ANSI: "12"},
+			},
+			0xFFFFFF,
+		},
+		{
+			termenv.ANSI,
+			true,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "9"},
+			},
+			0x0000FF,
+		},
+		// light
+		{
+			termenv.TrueColor,
+			false,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#0000FF", ANSI256: "231", ANSI: "12"},
+			},
+			0x0000FF,
+		},
+		{
+			termenv.ANSI256,
+			false,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#FF0000", ANSI256: "21", ANSI: "12"},
+			},
+			0x0000FF,
+		},
+		{
+			termenv.ANSI,
+			false,
+			CompleteAdaptiveColor{
+				Dark:  CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "12"},
+				Light: CompleteColor{TrueColor: "#FF0000", ANSI256: "231", ANSI: "9"},
+			},
+			0xFF0000,
+		},
+	}
+
+	for i, tc := range tt {
+		SetColorProfile(tc.profile)
+		SetHasDarkBackground(tc.darkBg)
+
+		r, g, b, _ := tc.input.RGBA()
+		o := uint(r/256)<<16 + uint(g/256)<<8 + uint(b/256)
+
+		if o != tc.expected {
+			t.Errorf("expected %X, got %X (test #%d)", tc.expected, o, i+1)
+		}
+	}
+}