[[ColourHexValue::| ]][[ColourName::| ]] [[ColourType::| ]] Transparent Fluorescent Green (Colour-ID: 49), colloquially known as neon green, is a colour for transparent LEGO elements. The first parts molded in this colour were introduced in 1990 as part of the LEGO Space sub-theme M-Tron. The colour is still in use today. It should be noted that this colour is actually yellow chartreuse.