[BUG] update documentation site with correct variable names

[ryuhhnn]

    --color-surface: #ffffff;
    --color-black: #000000;
    --color-primary: #2c6fb7;
    --color-primary-light: #679dea;
    --color-primary-dark: #004587;
    --color-secondary: #69c9b9;
    --color-secondary-light: #9cfceb;
    --color-secondary-dark: #349889;
    --color-gray-lightest: #e1e3e4;
    --color-gray-light: #c4c7ca;
    --color-gray-dark: #9fa4a8;
    --color-gray-darkest: #6c737a;
    --color-warning: #fcb61a;
    --color-warning-light: #fdd375;
    --color-warning-lightest: #fef0d1;
    --color-error: #bc1c16;
    --color-error-light: #fdd375;
    --color-error-lightest: #fef0d1;
    --color-success: #00870a;
    --color-success-light: #fdd375;
    --color-success-lightest: #fef0d1;    --color-surface: #ffffff;
    --color-black: #000000;
    --color-primary: #2c6fb7;
    --color-primary-light: #679dea;
    --color-primary-dark: #004587;
    --color-secondary: #69c9b9;
    --color-secondary-light: #9cfceb;
    --color-secondary-dark: #349889;
    --color-gray-lightest: #e1e3e4;
    --color-gray-light: #c4c7ca;
    --color-gray-dark: #9fa4a8;
    --color-gray-darkest: #6c737a;
    --color-warning: #fcb61a;
    --color-warning-light: #fdd375;
    --color-warning-lightest: #fef0d1;
    --color-error: #bc1c16;
    --color-error-light: #fdd375;
    --color-error-lightest: #fef0d1;
    --color-success: #00870a;
    --color-success-light: #fdd375;
    --color-success-lightest: #fef0d1;