Nail the exact color dark green in your design by using the code from any one of these systems for color identification.
|RGB||r: 1, g: 50, b: 32|
|HSL||h: 158°, s: 96%, l: 10%|
|HSV||h: 158°, s: 98%, v: 20%|
|CMYK||c: 98%, m: 0%, y: 36%, k: 80%|
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, dark green is made of 0% red, 20% green, and 13% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 98% cyan, 0% magenta, 36% yellow, 80% black.