convert text files to CSS files

I dont know how helpful this will be but if you can get your color txt files down to 1 tab space and 1 color:

lightyellow #FFFFE0
lemonchiffon #FFFACD
lightgoldenrodyellow #FAFAD2
papayawhip #FFEFD5
moccasin #FFE4B5
peachpuff #FFDAB9
palegoldenrod #EEE8AA
khaki #F0E68C
darkkhaki #BDB76B
yellow #FFFF00

You could use php to write to a css file:

<?php
$file = "yellows.txt";
$colors = array();

$fh = fopen($file, 'r');

while (($row = fgetcsv($fh, 1000, "\t")) !== false) {
$colors[] = $row;
}
foreach($colors as $color) {
$colorScheme .= "--$color[0]: $color[1]; \n";
}

$colorfile = fopen("yellowScheme.css", "w");

fwrite($colorfile, ":root {\n");
fwrite($colorfile, $colorScheme);
fwrite($colorfile, "}");

fclose($colorfile);
?>

Which will output:

:root {
--lightyellow: #FFFFE0;
--lemonchiffon: #FFFACD;
--lightgoldenrodyellow: #FAFAD2;
--papayawhip: #FFEFD5;
--moccasin: #FFE4B5;
--peachpuff: #FFDAB9;
--palegoldenrod: #EEE8AA;
--khaki: #F0E68C;
--darkkhaki: #BDB76B;
--yellow: #FFFF00;
}

have you ever heard of Sass... https://sass-lang.com/ ?

from there you can

• or playing with existing built in function https://sass-lang.com/documentation/values/colors , https://sass-lang.com/documentation/modules/color
• or using your own mixin, here is an idea of playing with it https://www.educba.com/sass-each/?source=leftnav

that way you can employ a Text based table that the mixin will convert as you like.

this way getting you yellows.txt example

open sassmeister https://www.sassmeister.com/

on the left window paste

$colorbank :
lightyellow 			#FFFFE0 	rgb(255,255,224),
lemonchiffon 			#FFFACD 	rgb(255,250,205),
lightgoldenrodyellow 	#FAFAD2 	rgb(250,250,210),
papayawhip 				#FFEFD5 	rgb(255,239,213),
moccasin 				#FFE4B5 	rgb(255,228,181),
peachpuff 				#FFDAB9 	rgb(255,218,185),
palegoldenrod 			#EEE8AA 	rgb(238,232,170),
khaki 					#F0E68C 	rgb(240,230,140),
darkkhaki 				#BDB76B 	rgb(189,183,107),
yellow 					#FFFF00 	rgb(255,255,0);

@each $name, $hex, $rgb in $colorbank {
  .color-#{$name} {
    color: $hex;
    color: $rgb;
  }
}

and see what happen on the right window

in fact I just added a variable name, a comma on each line, but the last one a semicolon to your text

then a simple mixin... and you can convert it as you like... 

as you can see, if the rgb value correspond to an existing referenced color, it will be translated to it... change the rgb value and you'll see that the label name wont be used anymore, but an hex value...

in any case, be careful not to reinvent hot water

What you have there is neither LESS, SASS or SCSS.  So I don't know what you're hoping to do with it.

What you have now is closer to _root.scss variables which are frequently used in Bootstrap Themeing.

https://getbootstrap.com/docs/4.0/getting-started/theming/

:root {
  --blue: #007bff;
  --indigo: #6610f2;
  --purple: #6f42c1;
  --pink: #e83e8c;
  --red: #dc3545;
  --orange: #fd7e14;
  --yellow: #ffc107;
  --green: #28a745;
  --teal: #20c997;
  --cyan: #17a2b8;
  --white: #fff;
  --gray: #6c757d;
  --gray-dark: #343a40;
  --primary: #007bff;
  --secondary: #6c757d;
  --success: #28a745;
  --info: #17a2b8;
  --warning: #ffc107;
  --danger: #dc3545;
  --light: #f8f9fa;
  --dark: #343a40;
  --breakpoint-xs: 0;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;