You may want to read Meaidi et al (2014). They obtained dream reports from congenitally blind, late blind, and matched sighted controls.
To quote the abstract, they found:
All blind participants had fewer visual dream impressions
compared to sighted control participants. In late blind participants, duration of blindness
was negatively correlated with duration, clarity, and color content of
visual dream impressions. Congenitally blind participants reported more auditory,
tactile, gustatory, and olfactory dream components compared to sighted control
participants. In contrast, late blind participants only reported more tactile
dream impressions. Blind and sighted control participants did not differ with
respect to emotional and thematic dream content. However, congenitally blind
participants reported more aggressive interactions and more nightmares
compared to the other two groups.
Our data show that blindness considerably alters the
sensory composition of dreams and that onset and duration of blindness
plays an important role. The increased occurrence of nightmares in congenitally blind
participants may be related to a higher number of threatening
experiences in daily life in this group.
In summarising previous research they note that:
previous studies seem to suggest that individuals who
become blind after the age of 7 years retain visual imagery in their
dreams, though congenitally blind or early blind (onset of
blindness before the ages of 5–7 years) individuals do not.
They cite a number of previous studies that have looked at dreams of blind people that you may want to check out:
 Kerr NH. Dreaming, imagery and perception. In: Kryger MH, Roth T, Dement WC, editors. Principles and practice of sleep medicine. Philadelphia, PA: W.B. Saunders Company; 2000. p. 482–90.
 Amadeo J, Gomez E. Eye movements, attention, and dreaming in subjects with life-long blindness. Can Psychiatry Assoc J 1966;11:501–7.
 Berger R, Olley P, Oswald I. The EEG, eye movements, and dreams of the blind. Quart J Exp Psychol 1962;14:183–6.
 Kerr NH, Foulkes D, Schmidt M. The structure of laboratory dream reports in blind and sighted subjects. J Nerv Ment Dis 1982;170:286–94.
 Hurovitz CS, Dunn S, Domhoff GW, Fiss H. The dreams of blind men and women: a replication and extension of previous findings. Dreaming 1999;9:183–93.
 Kirtley D. The psychology of blindness. Chicago, IL: Nelson-Hall; 1975.
 von Schumann H. Träume der blinden. Basel: S. Karger Co.; 1959.
 Sabo KT, Kirtley DD. Emotions in the dreams of the blind. Int J Rehabil Res 1980;3:382–5.
 Cason H. The nightmare dream. Psychol Monogr 1935;46:1–51.
 Kirtley D, Cannistraci K. Dreams of the visually handicapped: toward a normative approach. Am Found Blind Res Bull 1973;27:111–33.
 Spielberger CD, Gorsuch RL, Lushene PR, Vagg PR, Jacobs AG. Manual for the state-trait anxiety inventory (Form-Y). 2nd ed. Palo Alto, CA: Consulting Psychologists Press, Inc.; 1983.
Meaidi, A., Jennum, P., Ptito, M., & Kupers, R. (2014). The sensory construction of dreams and nightmare frequency in congenitally blind and late blind individuals. Sleep medicine, 15(5), 586-595. http://dx.doi.org/10.1016/j.sleep.2013.12.008