nearest-xterm-color.scss

@use 'sass:color';
@use 'sass:list';
@use 'sass:map';
@use 'sass:math';

$xterm: (
    1: #000000,
    2: #800000,
    3: #008000,
    4: #808000,
    5: #000080,
    6: #800080,
    7: #008080,
    8: #c0c0c0,
    9: #808080,
    10: #ff0000,
    11: #00ff00,
    12: #ffff00,
    13: #0000ff,
    14: #ff00ff,
    15: #00ffff,
    16: #ffffff,
    17: #000000,
    18: #00005f,
    19: #000087,
    20: #0000af,
    21: #0000d7,
    22: #0000ff,
    23: #005f00,
    24: #005f5f,
    25: #005f87,
    26: #005faf,
    27: #005fd7,
    28: #005fff,
    29: #008700,
    30: #00875f,
    31: #008787,
    32: #0087af,
    33: #0087d7,
    34: #0087ff,
    35: #00af00,
    36: #00af5f,
    37: #00af87,
    38: #00afaf,
    39: #00afd7,
    40: #00afff,
    41: #00d700,
    42: #00d75f,
    43: #00d787,
    44: #00d7af,
    45: #00d7d7,
    46: #00d7ff,
    47: #00ff00,
    48: #00ff5f,
    49: #00ff87,
    50: #00ffaf,
    51: #00ffd7,
    52: #00ffff,
    53: #5f0000,
    54: #5f005f,
    55: #5f0087,
    56: #5f00af,
    57: #5f00d7,
    58: #5f00ff,
    59: #5f5f00,
    60: #5f5f5f,
    61: #5f5f87,
    62: #5f5faf,
    63: #5f5fd7,
    64: #5f5fff,
    65: #5f8700,
    66: #5f875f,
    67: #5f8787,
    68: #5f87af,
    69: #5f87d7,
    70: #5f87ff,
    71: #5faf00,
    72: #5faf5f,
    73: #5faf87,
    74: #5fafaf,
    75: #5fafd7,
    76: #5fafff,
    77: #5fd700,
    78: #5fd75f,
    79: #5fd787,
    80: #5fd7af,
    81: #5fd7d7,
    82: #5fd7ff,
    83: #5fff00,
    84: #5fff5f,
    85: #5fff87,
    86: #5fffaf,
    87: #5fffd7,
    88: #5fffff,
    89: #870000,
    90: #87005f,
    91: #870087,
    92: #8700af,
    93: #8700d7,
    94: #8700ff,
    95: #875f00,
    96: #875f5f,
    97: #875f87,
    98: #875faf,
    99: #875fd7,
    100: #875fff,
    101: #878700,
    102: #87875f,
    103: #878787,
    104: #8787af,
    105: #8787d7,
    106: #8787ff,
    107: #87af00,
    108: #87af5f,
    109: #87af87,
    110: #87afaf,
    111: #87afd7,
    112: #87afff,
    113: #87d700,
    114: #87d75f,
    115: #87d787,
    116: #87d7af,
    117: #87d7d7,
    118: #87d7ff,
    119: #87ff00,
    120: #87ff5f,
    121: #87ff87,
    122: #87ffaf,
    123: #87ffd7,
    124: #87ffff,
    125: #af0000,
    126: #af005f,
    127: #af0087,
    128: #af00af,
    129: #af00d7,
    130: #af00ff,
    131: #af5f00,
    132: #af5f5f,
    133: #af5f87,
    134: #af5faf,
    135: #af5fd7,
    136: #af5fff,
    137: #af8700,
    138: #af875f,
    139: #af8787,
    140: #af87af,
    141: #af87d7,
    142: #af87ff,
    143: #afaf00,
    144: #afaf5f,
    145: #afaf87,
    146: #afafaf,
    147: #afafd7,
    148: #afafff,
    149: #afd700,
    150: #afd75f,
    151: #afd787,
    152: #afd7af,
    153: #afd7af,
    154: #afd7ff,
    155: #afff00,
    156: #afff5f,
    157: #afff87,
    158: #afffaf,
    159: #afffd7,
    160: #afffff,
    161: #d70000,
    162: #d7005f,
    163: #d70087,
    164: #d700af,
    165: #d700d7,
    166: #d700ff,
    167: #d75f00,
    168: #d75f5f,
    169: #d75f87,
    170: #d75faf,
    171: #d75fd7,
    172: #d75fff,
    173: #d78700,
    174: #d7875f,
    175: #d78787,
    176: #d787af,
    177: #d787d7,
    178: #d787ff,
    179: #d7af00,
    180: #d7af5f,
    181: #d7af87,
    182: #d7afaf,
    183: #d7afd7,
    184: #d7afff,
    185: #d7d700,
    186: #d7d75f,
    187: #d7d787,
    188: #d7d7af,
    189: #d7d7d7,
    190: #d7d7ff,
    191: #d7ff00,
    192: #d7ff5f,
    193: #d7ff87,
    194: #d7ffaf,
    195: #d7ffd7,
    196: #d7ffff,
    197: #ff0000,
    198: #ff005f,
    199: #ff0087,
    200: #ff00af,
    201: #ff00d7,
    202: #ff00ff,
    203: #ff5f00,
    204: #ff5f5f,
    205: #ff5f87,
    206: #ff5faf,
    207: #ff5fd7,
    208: #ff5fff,
    209: #ff8700,
    210: #ff875f,
    211: #ff8787,
    212: #ff87af,
    213: #ff87d7,
    214: #ff87ff,
    215: #ffaf00,
    216: #ffaf5f,
    217: #ffaf87,
    218: #ffafaf,
    219: #ffafd7,
    220: #ffafff,
    221: #ffd700,
    222: #ffd75f,
    223: #ffd787,
    224: #ffd7af,
    225: #ffd7d7,
    226: #ffd7ff,
    227: #ffff00,
    228: #ffff5f,
    229: #ffff87,
    230: #ffffaf,
    231: #ffffd7,
    232: #ffffff,
    233: #080808,
    234: #121212,
    235: #1c1c1c,
    236: #262626,
    237: #303030,
    238: #3a3a3a,
    239: #444444,
    240: #4e4e4e,
    241: #585858,
    242: #626262,
    243: #6c6c6c,
    244: #767676,
    245: #808080,
    246: #8a8a8a,
    247: #949494,
    248: #9e9e9e,
    249: #a8a8a8,
    250: #b2b2b2,
    251: #bcbcbc,
    252: #c6c6c6,
    253: #d0d0d0,
    254: #dadada,
    255: #e4e4e4,
    256: #eeeeee,
);

@function nearest($needle, $term, $list: $xterm, ) {
    $mindistance: null;
    $distance: ();
    
    $nr: color.red($needle);
    $ng: color.green($needle);
    $nb: color.blue($needle);
    
    @each $item in $list {
        $max: math.pow(2, $term);
        $cond-b: list.index($list, $item) <= $max;
        
        @if $cond-b {
            $index: list.nth($item, 1);
            $color: list.nth($item, 2);
            
            $color-r: color.red($color);
            $color-g: color.green($color);
            $color-b: color.blue($color);
            
            $calc-r: math.pow(($nr - $color-r), 2);
            $calc-g: math.pow(($ng - $color-g), 2);
            $calc-b: math.pow(($nb - $color-b), 2);
            
            $calc: $calc-r + $calc-g + $calc-b;
            
            $distance: list.append($distance, $calc, 'comma');
        }
    }
    
    $mindistance: math.min($distance...);
    
    @return list.index($distance, $mindistance) - 1;
}

@function colorlin($values) {
    $colorlinear: ();
    
    @each $color in $values {
        $colorlinear: list.append($colorlinear, $color, 'comma');
    }
    
    $r: list.nth($colorlinear, 1) * 255;
    $g: list.nth($colorlinear, 2) * 255;
    $b: list.nth($colorlinear, 3) * 255;
    $a: 1;
    
    @if (list.length($colorlinear) == 4) {
        $a: list.nth($colorlinear, 4);
    }
    
    $rgb: rgba($r, $g, $b, $a);
    
    @return $rgb;
}

githubcolors {
    $x: 8;
    /* current: #{math.pow(2, $x)} */
    color-----black: nearest(#000000, $x);
    color-------red: nearest(#dc3545, $x);
    color-----green: nearest(#73ba25, $x);
    color----yellow: nearest(#ffc107, $x);
    color------blue: nearest(#35b9ab, $x);
    color-----dgrey: nearest(#42474c, $x);
    color-----lgrey: nearest(#d2d5d8, $x);
    color-----white: nearest(#ffffff, $x);
}