Abstract: A gauge assembly having a pointer and gauge surface area with a scale representing operating parameters. The pointer has a first half and second half that are illuminated by light sources. The second half selectively changes color according to the portion of the scale that the pointer is indicating. This is accomplished by light isolation between the first and second halves as well as a prism to direct light from the midpoint of the pointer to the tip of the second half of the pointer. As the pointer moves about an axis, the prism for second half illumination aligns with respective chambers formed in a reflector to direct illumination from the different color lights. The second half color changes whenever the light source color under the prism is different. When the pointer is within predetermined ranges on the scale, the second half illumination changes color to represent that respective range.

Abstract: A gauge assembly having a pointer and gauge surface area with a scale representing operating parameters. The pointer has a first half and second half that are illuminated by light sources. The second half selectively changes color according to the portion of the scale that the pointer is indicating. This is accomplished by light isolation between the first and second halves as well as a prism to direct light from the midpoint of the pointer to the tip of the second half of the pointer. As the pointer moves about an axis, the prism for second half illumination aligns with respective chambers formed in a reflector to direct illumination from the different color lights. The second half color changes whenever the light source color under the prism is different. When the pointer is within predetermined ranges on the scale, the second half illumination changes color to represent that respective range.