Nail the exact color light green in your design by using the code from any one of these systems for color identification.
|RGB||r: 144, g: 238, b: 144|
|HSL||h: 120°, s: 73%, l: 75%|
|HSV||h: 120°, s: 39%, v: 93%|
|CMYK||c: 39%, m: 0%, y: 39%, k: 7%|
If you're identifying color for pretty much anything digital, you're working in an RGB colorspace. If the project you're working on requires percentage representation, light green is made of 56% red, 93% green, and 56% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 39% cyan, 0% magenta, 39% yellow, 7% black.