Vibrant Colours of Powers

Number Theory Level 2

\[\huge {\color{red}1\color{green}8^{\frac{\color{blue}3\color{orange}4\color{brown}3}{\color{violet}7}} \times \color{orange}3^{\frac{\color{violet}1\color{blue}2\color{green}3\color{orange}4\color{red}5}{\color{green}1\color{red}5}}}\]

Find the last digit of given expression above.