Themes css

theme.js

"use strict";
var gulp = require("gulp"),
	postcss = require("gulp-postcss"),
	gulp = require("gulp"),
	csso = require("gulp-csso"),
	replace = require('gulp-replace'),
	prefix = require("postcss-prefix-selector"),
	empty = require('postcss-discard-empty'),
	rename = require("gulp-rename"),
	filterDeclarations = require("postcss-filter-declarations");
// Собираем Stylus

gulp.task("theme", function() {
	var processors = [
		filterDeclarations({
			props: [
				"background-color",
				"color",
				"fill",
				"border",
				"border-bottom",
				"border-top",
				"border-left",
				"border-right"
			]
		}),
		empty(),
		prefix({
			prefix: '.red ' // <--- notice the traililng space!
		})
	];
	return gulp.src("./public/css/blocks.css")
		.pipe(postcss(processors))
		.pipe(rename('blocks-red.css'))
		.pipe(replace(/248dff/g, 'ff4569'))
		.pipe(replace(/017afd/g, 'ff4569'))
		.pipe(replace(/rgba\((36),(\d+),(\d+),([0-9]+\.[0-9]+|\d)\)/g, 'rgba(255,69,105,.03)'))
		.pipe(gulp.dest("./public/css/"));
});