My modified lua theme

base16-monokai-dark.lua

-- Monokai theme for Textadept
-- Theme author: Wimer Hazenberg (http://www.monokai.nl)
-- Base16 (https://github.com/chriskempson/base16)
-- Build with Base16 Builder (https://github.com/chriskempson/base16-builder)
-- Original Repository: https://github.com/rgieseke/ta-themes

-- Theme: http://chriskempson.github.io/base16/#monokai
-- Modified Repository: https://gist.github.com/thejeshgn/270de0b8198563539878/
-- Font: http://www.marksimonson.com/fonts/view/anonymous-pro 

local buffer = buffer
local property, property_int = buffer.property, buffer.property_int

property['color.base00'] = 0x222827
property['color.base01'] = 0x303838
property['color.base02'] = 0x3e4849
property['color.base03'] = 0x5e7175
property['color.base04'] = 0x859fa5
property['color.base05'] = 0xf2f8f8
property['color.base06'] = 0xf1f4f5
property['color.base07'] = 0xf5f8f9
property['color.base08'] = 0x7226f9
property['color.base09'] = 0x1f97fd
property['color.base0A'] = 0x75bff4 
property['color.base0B'] = 0x2ee2a6
property['color.base0C'] = 0xe4efa1
property['color.base0D'] = 0xefd966 
property['color.base0E'] = 0xff81ae
property['color.base0F'] = 0x3366cc

-- Default font.
property['font'], property['fontsize'] = 'Anonymous Pro', 14

-- Predefined styles.
property['style.default']       = 'font:%(font),size:%(fontsize),'..'fore:%(color.base05),back:%(color.base00)'
property['style.linenumber']    = 'fore:%(color.base03),back:%(color.base00)'
property['style.bracelight']    = 'fore:%(color.base0C),underlined'
property['style.bracebad']      = 'fore:%(color.base08)'
property['style.controlchar']   = '%(style.nothing)'
property['style.indentguide']   = 'fore:%(color.base03)'
property['style.calltip']       = 'fore:%(color.base02),back:%(color.base07)'

-- Token styles.
property['style.class']         = 'fore:%(color.base0A)'
property['style.comment']       = 'fore:%(color.base03)'
property['style.constant']      = 'fore:%(color.base09)'
property['style.embedded']      = 'fore:%(color.base0F),back:%(color.base06)'
property['style.error']         = 'fore:%(color.base08),italics'
property['style.function']      = 'fore:%(color.base09)'
property['style.identifier']    = ''
property['style.keyword']       = 'fore:%(color.base08)' --'fore:%(color.base0D)'
property['style.label']         = 'fore:%(color.base09)'
property['style.number']        = 'fore:%(color.base0C)'
property['style.operator']      = 'fore:%(color.base0E)'
property['style.preprocessor']  = 'fore:%(color.base0A)'
property['style.regex']         = 'fore:%(color.base0C)'
property['style.string']        = 'fore:%(color.base0B)'
property['style.type']          = 'fore:%(color.base0E)'
property['style.variable']      = 'fore:%(color.base0D)'
property['style.whitespace']    = ''

-- Multiple Selection and Virtual Space.
--buffer.additional_sel_alpha =
--buffer.additional_sel_fore =
--buffer.additional_sel_back =
--buffer.additional_caret_fore =

-- Caret and Selection Styles.
buffer:set_sel_fore(true, property_int['color.base00'])
buffer:set_sel_back(true, property_int['color.base04'])
--buffer.sel_alpha =
buffer.caret_fore = property_int['color.base07']
buffer.caret_line_back = property_int['color.base01']
--buffer.caret_line_back_alpha =

-- Fold Margin.
buffer:set_fold_margin_colour(true, property_int['color.base00'])
buffer:set_fold_margin_hi_colour(true, property_int['color.base00'])

-- Markers.
local MARK_BOOKMARK, t_run = textadept.bookmarks.MARK_BOOKMARK, textadept.run
--buffer.marker_fore[MARK_BOOKMARK] = property_int['color.base05']
buffer.marker_back[MARK_BOOKMARK] = property_int['color.base0D']
--buffer.marker_fore[t_run.MARK_WARNING] = property_int['color.base05']
buffer.marker_back[t_run.MARK_WARNING] = property_int['color.base0A']
--buffer.marker_fore[t_run.MARK_ERROR] = property_int['color.base05']
buffer.marker_back[t_run.MARK_ERROR] = property_int['color.base08']
for i = 25, 31 do -- fold margin markers
  buffer.marker_fore[i] = property_int['color.base00']
  buffer.marker_back[i] = property_int['color.base03']
  buffer.marker_back_selected[i] = property_int['color.base02']
end

-- Indicators.
local INDIC_BRACEMATCH = textadept.editing.INDIC_BRACEMATCH
buffer.indic_fore[INDIC_BRACEMATCH] = property_int['color.base06']
local INDIC_HIGHLIGHT = textadept.editing.INDIC_HIGHLIGHT
buffer.indic_fore[INDIC_HIGHLIGHT] = property_int['color.base0F']
buffer.indic_alpha[INDIC_HIGHLIGHT] = 255

-- Long Lines.
buffer.edge_colour = property_int['color.base01']

-- Add red and green for diff lexer.
property['color.red'] = property['color.base08']
property['color.green'] = property['color.base0B']

-- Other settings
buffer.view_ws            = buffer.WS_VISIBLEALWAYS
buffer.use_tabs           = true
buffer.wrap_visual_flags  = buffer.WRAPVISUALFLAGLOC_START_BY_TEXT
buffer.wrap_mode          = buffer.WRAP_WHITESPACE

index.html

<html>
<head>
<style>
.base00-background { background-color: #272822; }
.base01-background { background-color: #383830; }
.base02-background { background-color: #49483e; }
.base03-background { background-color: #75715e; }
.base04-background { background-color: #a59f85; }
.base05-background { background-color: #f8f8f2; }
.base06-background { background-color: #f5f4f1; }
.base07-background { background-color: #f9f8f5; }
.base08-background { background-color: #f92672; }
.base09-background { background-color: #fd971f; }
.base0A-background { background-color: #f4bf75; }
.base0B-background { background-color: #a6e22e; }
.base0C-background { background-color: #a1efe4; }
.base0D-background { background-color: #66d9ef; }
.base0E-background { background-color: #ae81ff; }
.base0F-background { background-color: #cc6633; }

.base00 { color: #272822; }
.base01 { color: #383830; }
.base02 { color: #49483e; }
.base03 { color: #75715e; }
.base04 { color: #a59f85; }
.base05 { color: #f8f8f2; }
.base06 { color: #f5f4f1; }
.base07 { color: #f9f8f5; }
.base08 { color: #f92672; }
.base09 { color: #fd971f; }
.base0A { color: #f4bf75; }
.base0B { color: #a6e22e; }
.base0C { color: #a1efe4; }
.base0D { color: #66d9ef; }
.base0E { color: #ae81ff; }
.base0F { color: #cc6633; }
</style>
</head>
<body>
    <div>
      <div class="block base00-background base07">00</div>
      <div class="block base01-background base07">01</div>
      <div class="block base02-background base07">02</div>
      <div class="block base03-background base07">03</div>
      <div class="block base04-background base00">04</div>
      <div class="block base05-background base00">05</div>
      <div class="block base06-background base00">06</div>
      <div class="block base07-background base00">07</div>
      <br>
      <div class="block base08-background base07">08</div>
      <div class="block base09-background base07">09</div>
      <div class="block base0A-background base07">0A</div>
      <div class="block base0B-background base07">0B</div>
      <div class="block base0C-background base07">0C</div>
      <div class="block base0D-background base07">0D</div>
      <div class="block base0E-background base07">0E</div>
      <div class="block base0F-background base07">0F</div>
    </div>
</body></html>