Here's the theme I use
{
"alfredtheme" : {
"result" : {
"textSpacing" : 4,
"subtext" : {
"size" : 12,
"colorSelected" : "#FFFFFFCC",
"font" : "System",
"color" : "#FFFFFF66"
},
"shortcut" : {
"size" : 16,
"colorSelected" : "#FFFFFFFF",
"font" : "System",
"color" : "#FEFFFF66"
},
"backgroundSelected" : "#016BDEFF",
"text" : {
"size" : 18,
"colorSelected" : "#FFFFFFFF",
"font" : "System",
"color" : "#FFFFFFD8"
},
"iconPaddingHorizontal" : 4,
"roundness" : 0,
"paddingVertical" : 2,
"iconSize" : 32
},
"search" : {
"backgroundSelected" : "#B2D7FFFF",
"paddingHorizontal" : 8,
"spacing" : 0,
"text" : {
"size" : 24,
"colorSelected" : "#000000FF",
"font" : "System Light",
"color" : "#FFFFFFFF"
},
"background" : "#00000000",
"roundness" : 0,
"paddingVertical" : 2
},
"window" : {
"color" : "#0D0D0DBF",
"paddingHorizontal" : 0,
"width" : 500,
"borderPadding" : 0,
"borderColor" : "#0000007F",
"blur" : 20,
"roundness" : 5,
"paddingVertical" : 0
},
"credit" : "dcrousso",
"separator" : {
"color" : "#CBCBCBF3",
"thickness" : 0
},
"scrollbar" : {
"color" : "#6D6D6DFF",
"thickness" : 0
},
"name" : "Simple Dark"
}
}