Overhaul color scheme

Completely reworked the color scheme to use only the 16 ANSI color
codes. Added a bit more color for functional purposes, but syntax
highlighting is still limited to comments and strings.

1 files changed, 72 insertions, 69 deletions

diff --git a/colors/btl.vim b/colors/btl.vim
index 7f356e7..5d87679 100644
--- a/colors/btl.vim
+++ b/colors/btl.vim
@@ -2,95 +2,98 @@
 " Maintainer: Benjamin Linskey <vim@linskey.org>
 " URL: https://github.com/blinskey/btl.vim
 
-" This is a simple, mostly grayscale colorscheme.
+" This is a simple colorscheme with minimal syntax highlighting that uses only
+" the 16 ANSI color codes.
 "
 " See h: group-name, highlight-groups
 
 if &t_Co < 256
-    echoerr "Colorscheme requires 256-color terminal"
+	echoerr "Colorscheme requires 256-color terminal"
 endif
 
 let g:colors_name="btl"
 
+set notermguicolors
 set background=dark
 highlight clear
 if exists("syntax_on")
-    syntax reset
+	syntax reset
 endif
 
-hi Normal       ctermfg=251     ctermbg=234
-hi Comment      ctermfg=246
-hi String       ctermfg=251     ctermbg=234     cterm=bold
-hi Tag          ctermfg=251                     cterm=bold
-hi Underlined   ctermfg=251                     cterm=underline
-hi Error        ctermfg=167     ctermbg=234
-hi Todo         ctermfg=251     ctermbg=234     cterm=bold
-hi ColorColumn                  ctermbg=237
-hi CursorLine                   ctermbg=235     cterm=none
-hi Visual                       ctermbg=238
-hi MatchParen   ctermfg=251     ctermbg=234     cterm=bold
-hi VertSplit    ctermfg=232     ctermbg=246     cterm=none
-hi StatusLine   ctermfg=236     ctermbg=251     cterm=bold
-hi TabLineSel   ctermfg=232     ctermbg=251     cterm=reverse,bold
-hi Folded       ctermfg=244     ctermbg=234     cterm=italic
-hi IncSearch    ctermfg=251     ctermbg=234     cterm=underline,bold,italic
-hi Search       ctermfg=251     ctermbg=234     cterm=underline,bold,italic
-hi LineNr       ctermfg=244     ctermbg=234
-hi CursorLineNr ctermfg=251     ctermbg=234     cterm=bold
-hi Pmenu        ctermfg=234     ctermbg=246
-hi PmenuSel     ctermfg=251     ctermbg=235     cterm=bold
-hi PMenuSbar    ctermfg=246     ctermbg=246
-hi DiffAdd      ctermfg=green   ctermbg=234     cterm=bold
-hi DiffChange   ctermfg=blue    ctermbg=234
-hi DiffDelete   ctermfg=red     ctermbg=234     cterm=bold
-hi DiffText     ctermfg=yellow  ctermbg=234     cterm=bold
+hi Normal		ctermfg=7		ctermbg=0		cterm=none
+hi Comment		ctermfg=4		ctermbg=0		cterm=italic
+hi String		ctermfg=2		ctermbg=0		cterm=none
+hi Tag			ctermfg=7		ctermbg=0		cterm=bold
+hi Underlined	ctermfg=7		ctermbg=0		cterm=underline
+hi Error		ctermfg=1		ctermbg=0		cterm=none
+hi Todo			ctermfg=4		ctermbg=0		cterm=bold
+hi ColorColumn	ctermfg=none	ctermbg=8		cterm=none
+hi CursorLine	ctermfg=none	ctermbg=none	cterm=underline
+hi Visual		ctermfg=0		ctermbg=5		cterm=none
+hi MatchParen	ctermfg=15		ctermbg=0		cterm=bold
+hi StatusLine	ctermfg=0		ctermbg=12		cterm=bold
+hi StatusLineNC	ctermfg=0       ctermbg=7       cterm=none
+hi TabLine		ctermfg=0       ctermbg=7       cterm=none
+hi TabLineSel	ctermfg=0		ctermbg=4		cterm=bold
+hi Folded		ctermfg=13		ctermbg=0		cterm=italic
+hi IncSearch	ctermfg=0		ctermbg=3		cterm=bold
+hi Search		ctermfg=0		ctermbg=3		cterm=bold
+hi LineNr		ctermfg=8		ctermbg=0		cterm=none
+hi Pmenu		ctermfg=0		ctermbg=13		cterm=none
+hi PmenuSel		ctermfg=2		ctermbg=0		cterm=bold
+hi PMenuSbar	ctermfg=8		ctermbg=8		cterm=none
+hi PMenuThumb	ctermfg=7		ctermbg=7		cterm=none
+hi DiffAdd		ctermfg=2		ctermbg=0		cterm=bold
+hi DiffChange	ctermfg=3		ctermbg=0		cterm=bold
+hi DiffDelete	ctermfg=1		ctermbg=0		cterm=bold
+hi DiffText		ctermfg=3		ctermbg=0		cterm=bold,underline
+hi SpecialKey	ctermfg=11		ctermbg=0		cterm=bold
 
+hi! link TabLine        TabLineFill
 hi! link StatusLineNC   VertSplit
-hi! link TabLine        StatusLine
-hi! link TabLineFill    StatusLine
-hi! link Title          VertSplit
-hi! link ModeMsg        Normal
-hi! link NonText        Normal
-hi! link Character      String
-hi! link Constant       Normal
-hi! link Number         Normal
-hi! link Boolean        Normal
-hi! link Float          Normal
-hi! link Function       Normal
-hi! link Identifier     Normal
-hi! link Keyword        Normal
-hi! link Statement      Normal
-hi! link Conditional    Normal
-hi! link Repeat         Normal
-hi! link Label          Normal
-hi! link Operator       Normal
-hi! link Exception      Normal
-hi! link PreProc        Normal
-hi! link Include        Normal
-hi! link Define         Normal
-hi! link Macro          Normal
-hi! link PreCondit      Normal
-hi! link Type           Normal
-hi! link StorageClass   Normal
-hi! link Structure      Normal
-hi! link Typedef        Normal
-hi! link Special        Normal
-hi! link SpecialKey     Normal
-hi! link SpecialChar    Normal
-hi! link Delimiter      Normal
+hi! link NonText        SpecialKey
+hi! link CursorLineNr   LineNr
+hi! link Title			VertSplit
+hi! link ModeMsg		Normal
+hi! link Character		String
+hi! link Constant		Normal
+hi! link Number			Normal
+hi! link Boolean		Normal
+hi! link Float			Normal
+hi! link Function		Normal
+hi! link Identifier		Normal
+hi! link Keyword		Normal
+hi! link Statement		Normal
+hi! link Conditional	Normal
+hi! link Repeat			Normal
+hi! link Label			Normal
+hi! link Operator		Normal
+hi! link Exception		Normal
+hi! link PreProc		Normal
+hi! link Include		Normal
+hi! link Define			Normal
+hi! link Macro			Normal
+hi! link PreCondit		Normal
+hi! link Type			Normal
+hi! link StorageClass	Normal
+hi! link Structure		Normal
+hi! link Typedef		Normal
+hi! link Special		Normal
+hi! link SpecialChar	Normal
+hi! link Delimiter		Normal
 hi! link SpecialComment Normal
-hi! link Debug          Normal
-hi! link Ignore         Normal
-hi! link ErrorMsg       Error
-hi! link Directory      String
-hi! link Title          Normal
+hi! link Debug			Normal
+hi! link Ignore			Normal
+hi! link ErrorMsg		Error
+hi! link Directory		String
+hi! link Title			Normal
 
 hi! link gitcommitOverflow Error
 
 hi! link helpHyperTextJump String
 
-hi ALEError     ctermfg=167     ctermbg=234     cterm=reverse
-hi ALEWarning   ctermfg=208     ctermbg=234     cterm=reverse
-hi ALEInfo      ctermfg=114     ctermbg=234     cterm=reverse
+hi! ALEError	ctermfg=0	ctermbg=1	cterm=none
+hi! ALEWarning	ctermfg=0	ctermbg=3	cterm=none
+hi! ALEInfo	ctermfg=0	ctermbg=4	cterm=reverse
 hi! link ALEStyleError ALEError
 hi! link ALEStyleWarning ALEWarning