diff --git a/colors/paper-custom.erb b/colors/paper-custom.erb
index ffc1d5f..484bc7e 100644
--- a/colors/paper-custom.erb
+++ b/colors/paper-custom.erb
@@ -43,6 +43,7 @@
     color_5_strong          = ["#5c6191", 17, "darkblue"]
 
     fg_error                = ["#d70000", 196, "red"]
+    bg_error                = ["#ffd7d7", 196, "red"]
     fg_spellcap             = ["#d75f00", 166, "yellow"]
     fg_spellrare            = ["#d7813e", 247, "darkyellow"]
     fg_spelllocal           = fg_spellrare
@@ -122,7 +123,7 @@
           [ "Ignore", "NONE", bg, "NONE" ],
           [ "Conceal", "NONE", "NONE", "NONE" ],
 
-          [ "Error", "NONE", fg_error, "bold" ],
+          [ "Error", bg_error, fg_error, "bold" ],
 
           [ "Underlined", "NONE", "NONE", "underline" ],
 
@@ -205,6 +206,8 @@
           [ "cssPseudoClassId",    "cssClassName" ],
           [ "cssKeyFrameSelector", "Label" ],
           [ "cssFunctionName",     "cssFunction" ],
+          [ "cssCustomProp",       "scssVariable" ],
+          [ "cssImportant",       "Error" ],
           [ "cssBraces",           "Noise" ],
           [ "cssUnitDecorators",   "NONE", fg_strong, "NONE" ],
           [ "cssSelectorOp",       "Conditional" ],
@@ -435,7 +438,7 @@
           [ "CocInfoSign", "Question" ],
           [ "CocHintSign", "Question" ],
           [ "CocHighlightText", "IncSearch" ],
-          [ "CocUnderline", "NONE", fg_error, "NONE" ],
+          [ "CocUnderline", "Error" ],
           [ "LspErrorText", "ErrorMsg" ],
           [ "LspWarningText", "WarningMsg" ],
           [ "LspInformationText", "Question" ],
diff --git a/colors/paper-custom.vim b/colors/paper-custom.vim
index b2b1fde..3612964 100644
--- a/colors/paper-custom.vim
+++ b/colors/paper-custom.vim
@@ -55,7 +55,7 @@ if ($TERM =~ '256' || &t_Co >= 256) || has("gui_running")
     hi Todo ctermbg=NONE ctermfg=196 cterm=bold,italic guibg=NONE guifg=#d70000 gui=bold,italic
     hi Ignore ctermbg=NONE ctermfg=234 cterm=NONE guibg=NONE guifg=#ffffff gui=NONE
     hi Conceal ctermbg=NONE ctermfg=NONE cterm=NONE guibg=NONE guifg=NONE gui=NONE
-    hi Error ctermbg=NONE ctermfg=196 cterm=bold guibg=NONE guifg=#d70000 gui=bold
+    hi Error ctermbg=196 ctermfg=196 cterm=bold guibg=#ffd7d7 guifg=#d70000 gui=bold
     hi Underlined ctermbg=NONE ctermfg=NONE cterm=underline guibg=NONE guifg=NONE gui=underline
     hi StatusLine ctermbg=238 ctermfg=255 cterm=italic guibg=#efefef guifg=#555555 gui=italic
     hi StatusLineNC ctermbg=238 ctermfg=243 cterm=italic guibg=#efefef guifg=#929292 gui=italic
@@ -116,6 +116,8 @@ if ($TERM =~ '256' || &t_Co >= 256) || has("gui_running")
     hi link cssPseudoClassId cssClassName
     hi link cssKeyFrameSelector Label
     hi link cssFunctionName cssFunction
+    hi link cssCustomProp scssVariable
+    hi link cssImportant Error
     hi link cssBraces Noise
     hi cssUnitDecorators ctermbg=NONE ctermfg=232 cterm=NONE guibg=NONE guifg=#777777 gui=NONE
     hi link cssSelectorOp Conditional
@@ -297,7 +299,7 @@ if ($TERM =~ '256' || &t_Co >= 256) || has("gui_running")
     hi link CocInfoSign Question
     hi link CocHintSign Question
     hi link CocHighlightText IncSearch
-    hi CocUnderline ctermbg=NONE ctermfg=196 cterm=NONE guibg=NONE guifg=#d70000 gui=NONE
+    hi link CocUnderline Error
     hi link LspErrorText ErrorMsg
     hi link LspWarningText WarningMsg
     hi link LspInformationText Question
@@ -371,7 +373,7 @@ elseif &t_Co == 8 || $TERM !~# '^linux' || &t_Co == 16
     hi Todo ctermbg=NONE ctermfg=red cterm=bold,italic
     hi Ignore ctermbg=NONE ctermfg=black cterm=NONE
     hi Conceal ctermbg=NONE ctermfg=NONE cterm=NONE
-    hi Error ctermbg=NONE ctermfg=red cterm=bold
+    hi Error ctermbg=red ctermfg=red cterm=bold
     hi Underlined ctermbg=NONE ctermfg=NONE cterm=underline
     hi StatusLine ctermbg=gray ctermfg=white cterm=italic
     hi StatusLineNC ctermbg=gray ctermfg=gray cterm=italic
@@ -432,6 +434,8 @@ elseif &t_Co == 8 || $TERM !~# '^linux' || &t_Co == 16
     hi link cssPseudoClassId cssClassName
     hi link cssKeyFrameSelector Label
     hi link cssFunctionName cssFunction
+    hi link cssCustomProp scssVariable
+    hi link cssImportant Error
     hi link cssBraces Noise
     hi cssUnitDecorators ctermbg=NONE ctermfg=gray cterm=NONE
     hi link cssSelectorOp Conditional
@@ -613,7 +617,7 @@ elseif &t_Co == 8 || $TERM !~# '^linux' || &t_Co == 16
     hi link CocInfoSign Question
     hi link CocHintSign Question
     hi link CocHighlightText IncSearch
-    hi CocUnderline ctermbg=NONE ctermfg=red cterm=NONE
+    hi link CocUnderline Error
     hi link LspErrorText ErrorMsg
     hi link LspWarningText WarningMsg
     hi link LspInformationText Question