Which colours are similar?

Unnamed colours, one on each line:

Named colours, one on each line

--alert-bg: #191919;
    --alert-bg: #f5f5f5;
        --button-bg: #333333;
    --button-bg: #e9e9e9;
        --button-border-color: #585858;
    --button-border-color: #b0b0b0;
    --code-bg: #f9f2f4;
    --code-color: #4b504e;
        --danger-alert-bg: #820000;
    --danger-alert-bg: #be0000;
        --danger-alert-color: #ffdfd1;
        --danger-button-bg: #be0000;
    --danger-button-bg: #be0000;
        --danger-button-border-color: #650000;
    --danger-button-border-color: #650000;
    --danger-color: #d40000;
        --danger-color: #ffbaad;
    --help-color: #333333;
        --help-color: #dbdbdb;
    --hr-color: #eeeeee;
        --info-alert-bg: #003469;
    --info-alert-bg: #deeeff;
    --info-alert-color: #002e5b;
        --info-alert-color: #e6f8ff;
        --info-button-bg: #324fad;
    --info-button-bg: #324fad;
        --info-button-border-color: #060060;
    --info-button-border-color: #060060;
    --info-color: #0c6dcf;
        --info-color: #b8c9ff;
        --input-bg: #111111;
    --input-bg: #f8f8f8;
    --link-color: #0000ee;
        --link-color: #7cd6ff;
    --main-color: #a2d1f0;
    --main-darker: #85c3eb;
        --muted-alert-bg: #191919;
    --muted-alert-bg: #e9e9e9;
        --muted-alert-color: #eeeeee;
        --muted-button-bg: #636363;
    --muted-button-bg: #636363;
        --muted-button-border-color: #444444;
    --muted-button-border-color: #444444;
    --muted-color: #636363;
        --muted-color: #cacbcd;
    --pre-border: #cccccc;
        --primary-button-bg: #00626f;
    --primary-button-bg: #76f2ff;
        --primary-button-border-color: #008996;
    --primary-button-border-color: #00a6bf;
        --score-correct-color: #00e254;
    --score-partial-color: #bc8929;
        --score-partial-color: #d1992e;
        --success-alert-bg: #005200;
    --success-alert-bg: #7bffac;
    --success-alert-color: #003400;
        --success-alert-color: #7cffad;
        --success-button-bg: #006400;
    --success-button-bg: #008000;
        --success-button-border-color: #008000;
    --success-button-border-color: #2f9a2b;
    --success-color: #008000;
        --success-color: #7cffad;
        --table-border-color: #666666;
    --table-border-color: #cccccc;
        --td-bg: #1f1f1f;
    --td-bg: #f8f8f8;;
    --td-stripe-bg: #f9f9f9;
    --td-warning-color: #996700;
        --th-bg: #222222;
    --th-bg: #e6e6e6;
        --top-nav-bg: #213f52;
    --top-nav-bg: #a2d1f0;
        --top-nav-border:#19465f;
    --top-nav-border: #85c3eb;
    --top-nav-muted-color: #444444;
        --top-nav-muted-color: #d8d8d8;
        --warning-alert-bg: #9b2f00;
    --warning-alert-bg: #fff485;
    --warning-alert-color: #5e2e00;
        --warning-alert-color: #fff486;
        --warning-button-bg: #bd4800;
    --warning-button-bg: #ffc251;
        --warning-button-border-color: #a93c00;
    --warning-button-border-color: #e2a62e;
    --warning-color: #996700;
        --warning-color: #fdc04f;

Key: luminance →, hue ↑, chroma roundness