A display device comprising: a first substrate; a pixel structure disposed on the first substrate; a first optical filter disposed on the pixel structure; a first color filter disposed on the first optical filter, having a first color, and having a first refractive index; a second optical filter disposed on the pixel structure, spaced from the first optical filter,; a second color filter disposed on the second optical filter, having the second color, and having a second refractive index; and a second substrate disposed on the first color filter and the second color filter, wherein the second substrate has a third refractive index, and the display device further comprising: a third optical filter disposed on the pixel structure and spaced from each of the first optical filter and the second optical filter; and a third color filter disposed on the third optical filter, having a third color, and having a fourth refractive index and wherein the second optical filter is configured to transmit a first part of light of the second color, wherein the first optical filter is configured to convert a second part of the light of the second color into light of the first color, and wherein the third optical filter is configured to convert a third part of the light of the second color into light of the third color; characterized by the second color filter includes a pigment having the second color and the second refractive index that approximates or is substantially equal to the third refractive index of the second substrate so that the second refractive index is between 95% and 105% of the third refractive index, and a difference between the third refractive index and the second refractive index is less than a difference between the third refractive index and the first refractive index. a first substrate; a pixel structure disposed on the first substrate; a first optical filter disposed on the pixel structure; a first color filter disposed on the first optical filter, having a first color, and having a first refractive index; a second optical filter disposed on the pixel structure, spaced from the first optical filter,; a second color filter disposed on the second optical filter, having the second color, and having a second refractive index; and a second substrate disposed on the first color filter and the second color filter, wherein the second substrate has a third refractive index, and the display device further comprising: a third optical filter disposed on the pixel structure and spaced from each of the first optical filter and the second optical filter; and a third color filter disposed on the third optical filter, having a third color, and having a fourth refractive index and wherein the second optical filter is configured to transmit a first part of light of the second color, wherein the first optical filter is configured to convert a second part of the light of the second color into light of the first color, and wherein the third optical filter is configured to convert a third part of the light of the second color into light of the third color; characterized by the second color filter includes a pigment having the second color and the second refractive index that approximates or is substantially equal to the third refractive index of the second substrate so that the second refractive index is between 95% and 105% of the third refractive index, and a difference between the third refractive index and the second refractive index is less than a difference between the third refractive index and the first refractive index. a third optical filter disposed on the pixel structure and spaced from each of the first optical filter and the second optical filter; and a third color filter disposed on the third optical filter, having a third color, and having a fourth refractive index and wherein the second optical filter is configured to transmit a first part of light of the second color, wherein the first optical filter is configured to convert a second part of the light of the second color into light of the first color, and wherein the third optical filter is configured to convert a third part of the light of the second color into light of the third color; characterized by the second color filter includes a pigment having the second color and the second refractive index that approximates or is substantially equal to the third refractive index of the second substrate so that the second refractive index is between 95% and 105% of the third refractive index, and a difference between the third refractive index and the second refractive index is less than a difference between the third refractive index and the first refractive index.