Huygens' Descent to Titan: 110 Km from the Surface (credits: R. Pascal)

The haze of Titan's Atmosphere preferently scatters blue and UltraViolet light: this is the reason why the Outer Atmosphere of Titan appears blue in some Cassini images. In reality, the effect of a blue outer atmosphere on Titan may be less prominent than on this rendered image.
This was the altitude were the main parachute was jettisoned and first surface structures came into view for Huygens' cameras.