We report the generation of a continuous-wave squeezed vacuum resonant on the Rb $D_1$ line $\left(795\mathrm{nm}\right)$ using periodically poled $\mathrm{K}\mathrm{Ti}\mathrm{O}\mathrm{P}{\mathrm{O}}_4$ (PPKTP) crystals. With a frequency doubler and an optical parametric oscillator based on PPKTP crystals, we observed a squeezing level of $-2.75\pm 0.14\mathrm{dB}$ and an antisqueezing level of $+7.00\pm 0.13\mathrm{dB}$ . This system could be utilized for demonstrating storage and retrieval of the squeezed vacuum, which is important for the ultraprecise measurement of atomic spins as well as quantum information processing.