theme: Set default colors to ColorWhite

_examples/grid.go

@@ -63,6 +63,7 @@ func main() {
 		"",
 		"[3] Uploading File 3",
 	}
+    ls.Border = false
 
 	p := widgets.NewParagraph()
 	p.Text = "<> This row has 3 columns\n<- Widgets can be stacked up like left side\n<- Stacked widgets are treated as a single widget"

theme.go

@@ -132,13 +132,13 @@ var Theme = RootTheme{
 	},
 
 	Sparkline: SparklineTheme{
-		Line:  ColorBlack,
-		Title: NewStyle(ColorBlue),
+		Title: NewStyle(ColorWhite),
+		Line:  ColorWhite,
 	},
 
 	LineChart: LineChartTheme{
 		Lines: StandardColors,
-		Axes:  ColorBlue,
+		Axes:  ColorWhite,
 	},
 
 	Table: TableTheme{