fix: use more abstract values in template

current_colors.txt

@@ -1,10 +1,10 @@
-OLD_BG=888a85
-OLD_FG=090015
-OLD_SEL_BG=ff3388
-OLD_SEL_FG=000000
-OLD_TXT_BG=c0bbbb
-OLD_TXT_FG=000001
-OLD_MENU_BG=0e0021
-OLD_MENU_FG=878a85
-OLD_BTN_BG=85509b
-OLD_BTN_FG=0b0018
+OLD_BG="%BG%"
+OLD_FG="%FG%"
+OLD_MENU_BG="%MENU_BG%"
+OLD_MENU_FG="%MENU_FG%"
+OLD_SEL_BG="%SEL_BG%"
+OLD_SEL_FG="%SEL_FG%"
+OLD_TXT_BG="%TXT_BG%"
+OLD_TXT_FG="%TXT_FG%"
+OLD_BTN_BG="%BTN_BG%"
+OLD_BTN_FG="%BTN_FG%"

gtk-2.0/gtkrc

@@ -1,7 +1,7 @@
 # Oomox GTK Theme (Numix Fork)
 
 gtk-color-scheme =
-"base_color:#c0bbbb\nbg_color:#888a85\ntooltip_bg_color:#888a85\nselected_bg_color:#ff3388\ntext_color:#000001\nfg_color:#090015\ntooltip_fg_color:#090015\nselected_fg_color:#000000\nmenubar_bg_color:#0e0021\nmenubar_fg_color:#878a85\ntoolbar_bg_color:#888a85\ntoolbar_fg_color:#090015\nmenu_bg_color:#0e0021\nmenu_fg_color:#878a85\npanel_bg_color:#888a85\npanel_fg_color:#090015\nlink_color:#fc6f5d\nbtn_bg_color:#85509b\nbtn_fg_color:#0b0018\ntitlebar_bg_color:#0e0021\ntitlebar_fg_color:#878a85\n"
+"base_color:#%TXT_BG%\nbg_color:#%BG%\ntooltip_bg_color:#%BG%\nselected_bg_color:#%SEL_BG%\ntext_color:#%TXT_FG%\nfg_color:#%FG%\ntooltip_fg_color:#%FG%\nselected_fg_color:#%SEL_FG%\nmenubar_bg_color:#%MENU_BG%\nmenubar_fg_color:#%MENU_FG%\ntoolbar_bg_color:#%BG%\ntoolbar_fg_color:#%FG%\nmenu_bg_color:#%MENU_BG%\nmenu_fg_color:#%MENU_FG%\npanel_bg_color:#%BG%\npanel_fg_color:#%FG%\nlink_color:#fc6f5d\nbtn_bg_color:#%BTN_BG%\nbtn_fg_color:#%BTN_FG%\ntitlebar_bg_color:#%MENU_BG%\ntitlebar_fg_color:#%MENU_FG%\n"
 # Default Style
 
 style "murrine-default" {