The existence of quintessential dark energy around a black hole has considerable consequences on its spacetime geometry. Hence, in this article, we explore its effect on horizons and the silhouette generated by a Kerr–Newman black hole in quintessential dark energy. Moreover, to analyse the deflection angle of light, we utilize the Gauss–Bonnet theorem. The obtained result demonstrates that, due to the dragging effect, the black hole spin elongates its shadow in the direction of the rotational axis, while increases the deflection angle. On the other hand, the black hole charge diminishing its shadow, as well as the angle of light’s deflection. Besides, both spin and charge significantly increase the distortion effect in the black hole’s shadow. The quintessence parameter $\gamma$, increases the shadow radius, while decreases the distortion effect at higher values of charge and spin parameters.

黑洞周围典型的暗能量的存在对其时空几何形状具有相当大的影响。因此，在本文中，我们将探讨其对地平线和典型暗能量中Kerr-Newman黑洞产生的轮廓的影响。此外，为了分析光的偏转角，我们利用了高斯-邦纳定理。所获得的结果表明，由于拖曳效应，黑洞自旋在旋转轴方向上延长了其阴影，同时增加了偏转角。另一方面，黑洞的电荷会减少其阴影以及光线的偏转角度。此外，自旋和电荷都会显着增加黑洞阴影中的失真效果。精髓参数$\gamma$增大阴影半径，同时减小较高电荷和自旋参数值时的失真效果。