Citadel Flash Gitz Yellow Layer Paint is designed to be multi-layered. This light yellow color is slightly transparent so you can use it to build your color over several layers until you're happy with it. Now the paint does require a bit of practice to use, but the results are well worth it.
The layer paints are best used as a 2-step highlight, so two paints for each color but this is a guideline. For example, Flash Gitz Yellow can be combined with Yriel Yellow. You start with the darker of the two and apply it to the surfaces that you eventually want to provide this light yellow color.
Because the paint is a bit transparent, you will continue to see the base color a bit, but by using Flash Gitz Yellow together with Yriel Yellow, you can use that transparency to apply the layers. If you apply the lightest color after the darkest color in maybe 1 or two layers, the last highlight of the lightest color will ensure that you have a great result.
The color of Citadel Flash Gitz Yellow (22-02) is similar to: The Army Painter Demonic Yelow (WP1107); Old Citadel Sunburst Yellow; Vallejo Game Color Sunblast Yellow (72006); Vallejo Model Color Flat Yellow; Instar Brilliant Yellow; Rackham Lahn Yellow (40); Reaper Master Sun Yellow (9008); Coat D'arms Sun Yellow (103).