Add missing source attributions

hexcolor/popular.go

@@ -1,5 +1,7 @@
 package hexcolor
 
+// These named palettes are sourced from https://www.color-hex.com/
+
 var Palettes = map[string][]int{
 	"#3":                            {0x2A4D69, 0x4B86B4, 0xADCBE3, 0xE7EFF6, 0x63ACE5},
 	"- Lips -":                      {0xF98787, 0xE76A6A, 0xD65B5B, 0xC14B4B, 0xB83F3F},

html/html.go

@@ -6,6 +6,7 @@ import (
 	"github.com/taigrr/go-colorpalettes/simplecolor"
 )
 
+// These colors are sourced from w3schools: https://www.w3schools.com/cssref/css_colors.asp
 var colors = simplecolor.NamedPalette{
 	"aliceblue":            0xF0F8FF,
 	"antiquewhite":         0xFAEBD7,