\documentclass[12pt,a4paper,sans]{moderncv}

% -------------------------------------------------------------------------------
% PACKAGES
% -------------------------------------------------------------------------------
\usepackage[utf8]{inputenc}
\usepackage[a4paper, top=1.5cm, margin=2.5cm]{geometry}
\usepackage{tikz}
\usepackage{xcolor}
% -------------------------------------------------------------------------------
% COLORS
% -------------------------------------------------------------------------------

\definecolor{white}{RGB}{255,255,255}
\definecolor{blue}{HTML}{3970AB}
\definecolor{gray}{HTML}{B9B9B9}
\definecolor{mint}{HTML}{50B48A}

% -------------------------------------------------------------------------------
% NEW COMMANDS
% -------------------------------------------------------------------------------

\newcommand\skill[1]{ 
  \begin{tikzpicture}
    \foreach [count=\i] \x/\y in {#1}
    {
      \draw[fill=gray, gray] (0,\i) rectangle (\y,\i+0.4);
      \draw[fill=white,mint](0,\i) rectangle (\x,\i+0.4);
    }
  \end{tikzpicture}
}
\newcommand{\givenskill}{}

% -------------------------------------------------------------------------------
% PERSONAL INFORMATION
% -------------------------------------------------------------------------------

\firstname{Tuan-Dat}
\familyname{Tran}
\email{tran.tuan-dat@mailbox.org}
\social[github]{TuDatTr}
% \quote{Be the change you  to see in the world}