A retractable blind assembly including: a top section with a first covering material extending between a fixed inclined head rail, when mounted for use, and a middle rail that is pivotable with respect to the head rail about a pivot center that is adjacent to a lowermost end of the head rail; the head rail extending upwardly at an acute angle to the horizontal; the middle rail being pivotable between a top deployed position, in which the middle rail extends horizontally, when the first covering material is extended and a retracted position, in which the middle rail extends upwardly at an acute angle to the horizontal and is adjacent the head rail, when the first covering material is fully retracted; a bottom section with a second covering material extending between the middle rail and a bottom rail; the bottom rail being movable vertically between a bottom deployed position, in which the bottom rail extends horizontally when the second covering material is fully extended, and the top deployed position in which the bottom rail extends horizontally adjacent the middle rail when the second covering material in the bottom section is retracted; the bottom rail being movable between the top deployed position and the retracted position, in which the bottom rail extends upwardly at an acute angle to the horizontal and is adjacent the middle rail, when the first covering material and the second covering material is fully retracted; the retractable blind assembly has a single lift cord configured to raise and lower the bottom rail to retract and extend the first covering material and the second covering material; characterized in that the single lift cord is routed in a single lift cord loop from the head rail, through the middle rail and the bottom rail, and back to the head rail; wherein the single lift cord is routed through the middle rail such that the single lift cord has inflection points associated with the middle rail and the single lift cord is routed through the bottom rail such that the single lift cord has inflection points associated with the bottom rail; and in that the single lift cord has fewer inflection points associated with the middle rail than associated with the bottom rail such that, when moving the bottom rail between the retracted and top deployed position, the friction exerted on the single lift cord by points of contact between the single lift cord and the bottom rail is greater than the friction exerted on the single lift cord by points of contact between the single lift cord and on the middle rail. a top section with a first covering material extending between a fixed inclined head rail, when mounted for use, and a middle rail that is pivotable with respect to the head rail about a pivot center that is adjacent to a lowermost end of the head rail; the head rail extending upwardly at an acute angle to the horizontal; the middle rail being pivotable between a top deployed position, in which the middle rail extends horizontally, when the first covering material is extended and a retracted position, in which the middle rail extends upwardly at an acute angle to the horizontal and is adjacent the head rail, when the first covering material is fully retracted; a bottom section with a second covering material extending between the middle rail and a bottom rail; the bottom rail being movable vertically between a bottom deployed position, in which the bottom rail extends horizontally when the second covering material is fully extended, and the top deployed position in which the bottom rail extends horizontally adjacent the middle rail when the second covering material in the bottom section is retracted; the bottom rail being movable between the top deployed position and the retracted position, in which the bottom rail extends upwardly at an acute angle to the horizontal and is adjacent the middle rail, when the first covering material and the second covering material is fully retracted; the retractable blind assembly has a single lift cord configured to raise and lower the bottom rail to retract and extend the first covering material and the second covering material; characterized in that the single lift cord is routed in a single lift cord loop from the head rail, through the middle rail and the bottom rail, and back to the head rail; wherein the single lift cord is routed through the middle rail such that the single lift cord has inflection points associated with the middle rail and the single lift cord is routed through the bottom rail such that the single lift cord has inflection points associated with the bottom rail; and in that the single lift cord has fewer inflection points associated with the middle rail than associated with the bottom rail such that, when moving the bottom rail between the retracted and top deployed position, the friction exerted on the single lift cord by points of contact between the single lift cord and the bottom rail is greater than the friction exerted on the single lift cord by points of contact between the single lift cord and on the middle rail.