An electrowetting display device comprising a plurality of electrowetting elements, an electrowetting element of the plurality of electrowetting elements comprising: a support plate having a surface; a first fluid adjoining the surface; a second fluid immiscible with the first fluid, the first fluid at least partially contacting the second fluid at an interface (55, 57) of the first fluid with the second fluid; a colour filter for filtering at least one wavelength from input light to output, from the colour filter, light with a predetermined hue, the colour filter overlapping a first part of the surface; a transmissive region of the electrowetting display device overlapping a second part of the surface and configured to transmit through the transmissive region light of the at least one wavelength; and an electrode associated with the support plate for use in applying a voltage to control a configuration of the first and second fluids, wherein a line of adjoinment of the interface with the surface is moveable along an axis for motion in dependence on the voltage; characterized in that: the colour filter has a shape comprising a first width of the colour filter at a first location along the axis for motion greater than a second width of the colour filter at a second location along the axis for motion, the configuration of the first and second fluids switchable, depending on a magnitude of the voltage, between: a first configuration with: the first fluid adjoining a first extent of the surface, and the first fluid overlapping a first extent of the colour filter and a first extent of the transmissive region; and a second configuration with: the first fluid adjoining a second extent of the surface different from the first extent of the surface, and the first fluid overlapping: a second extent of the colour filter different from the first extent of the colour filter; and a second extent of the transmissive region different from the first extent of the transmissive region. a support plate having a surface; a first fluid adjoining the surface; a second fluid immiscible with the first fluid, the first fluid at least partially contacting the second fluid at an interface (55, 57) of the first fluid with the second fluid; a colour filter for filtering at least one wavelength from input light to output, from the colour filter, light with a predetermined hue, the colour filter overlapping a first part of the surface; a transmissive region of the electrowetting display device overlapping a second part of the surface and configured to transmit through the transmissive region light of the at least one wavelength; and an electrode associated with the support plate for use in applying a voltage to control a configuration of the first and second fluids, wherein a line of adjoinment of the interface with the surface is moveable along an axis for motion in dependence on the voltage; a first configuration with: the first fluid adjoining a first extent of the surface, and the first fluid overlapping a first extent of the colour filter and a first extent of the transmissive region; and the first fluid adjoining a first extent of the surface, and the first fluid overlapping a first extent of the colour filter and a first extent of the transmissive region; and a second configuration with: the first fluid adjoining a second extent of the surface different from the first extent of the surface, and the first fluid overlapping: a second extent of the colour filter different from the first extent of the colour filter; and a second extent of the transmissive region different from the first extent of the transmissive region. the first fluid adjoining a second extent of the surface different from the first extent of the surface, and the first fluid overlapping: a second extent of the colour filter different from the first extent of the colour filter; and a second extent of the transmissive region different from the first extent of the transmissive region. a second extent of the colour filter different from the first extent of the colour filter; and a second extent of the transmissive region different from the first extent of the transmissive region.