Nail the exact color pastel green in your design by using the code from any one of these systems for color identification.
|RGB||r: 119, g: 221, b: 119|
|HSL||h: 120°, s: 60%, l: 67%|
|HSV||h: 120°, s: 46%, v: 87%|
|CMYK||c: 46%, m: 0%, y: 46%, k: 13%|
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, pastel green is made of 47% red, 87% green, and 47% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 46% cyan, 0% magenta, 46% yellow, 13% black.