diff --git a/internal/style/tss/color_test.go b/internal/style/tss/color_test.go
new file mode 100644
index 0000000..694a88e
--- /dev/null
+++ b/internal/style/tss/color_test.go
@@ -0,0 +1,17 @@
+package tss
+
+import "testing"
+
+func TestValueColor (test *testing.T) {
+	testValueColorRGBA(test, 0xFB380CFF, 0xFBFB, 0x3838, 0x0C0C, 0xFFFF)
+	testValueColorRGBA(test, 0xFB380C00, 0x0000, 0x0000, 0x0000, 0x0000)
+}
+
+func testValueColorRGBA (test *testing.T, col ValueColor, r, g, b, a uint32) {
+	gr, gg, gb, ga := col.RGBA()
+	test.Logf("testing RGBA for color #%08X", col)
+	if gr != r { test.Errorf("r component inequal (%04X != %04X)", gr, r) }
+	if gg != g { test.Errorf("g component inequal (%04X != %04X)", gg, g) }
+	if gb != b { test.Errorf("b component inequal (%04X != %04X)", gb, b) }
+	if ga != a { test.Errorf("a component inequal (%04X != %04X)", ga, a) }
+}
diff --git a/internal/style/tss/tss.go b/internal/style/tss/tss.go
index 7796bb4..35451c0 100644
--- a/internal/style/tss/tss.go
+++ b/internal/style/tss/tss.go
@@ -35,19 +35,19 @@ func (ValueColor) value () { }
 func (value ValueColor) RGBA () (r, g, b, a uint32) {
 	// extract components
 	bits := uint32(value)
-	r = (bits & 0xF000) >> 24
-	g = (bits & 0x0F00) >> 16
-	b = (bits & 0x00F0) >> 8
-	a = (bits & 0x000A)
+	r = (bits & 0xFF000000) >> 24
+	g = (bits & 0x00FF0000) >> 16
+	b = (bits & 0x0000FF00) >> 8
+	a = (bits & 0x000000FF)
 	// extend to 16 bits per channel
 	r = r << 8 | r
 	g = g << 8 | g
 	b = b << 8 | b
 	a = a << 8 | a
 	// alpha premultiply
-	r = (r * a) / 256
-	g = (g * a) / 256
-	b = (b * a) / 256
+	r = (r * a) / 0xFFFF
+	g = (g * a) / 0xFFFF
+	b = (b * a) / 0xFFFF
 	return
 }