\documentclass[12pt]{article}

\usepackage{geometry}
\usepackage{tikz}
\usepackage{xcolor}

\definecolor{orange}{HTML}{FFEACB}

\geometry{
    paperwidth=7.6cm,
    paperheight=10.7cm,
    landscape,
    left=5mm,
    top=2mm,
    right=5mm,
    bottom=5mm
}

\pagenumbering{gobble}

\begin{document}

\phantom{blabla}
\pagecolor{orange}

\end{document}