Holographic optical elements (HOEs) are versatile alternatives and complements to conventional refractive and reflective optics. With few exceptions, the manufacturing of HOEs based on holographic recording requires monochromatic light with a long coherence length and narrow linewidth, typically provided by lasers operating at a single longitudinal mode. The wavelength of the recording light is a key process parameter as it directly affects the spectral behavior and selectivity of the HOE at replay. Widely tunable continuous-wave optical-parametric-oscillator (OPO) devices are becoming increasingly popular in the field of applied holography, offering unparalleled wavelength coverage in the visible and near infrared spectral range in a single device with coherence and stability properties that match holography’s stringent requirements. The OPO’s wide tuning range translates into equally wide ranges of HOE replay wavelengths with little to no adjustment of the holographic recording geometry. This allows for drastic simplification of recording tools, as well straightforward adjustment of exposure recipes to compensate for any postprocessing shifts.