Nail the exact color pastel blue in your design by using the code from any one of these systems for color identification.
|RGB||r: 174, g: 198, b: 207|
|HSL||h: 196°, s: 26%, l: 75%|
|HSV||h: 196°, s: 16%, v: 81%|
|CMYK||c: 16%, m: 4%, y: 0%, k: 19%|
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 blue is made of 68% red, 78% green, and 81% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 16% cyan, 4% magenta, 0% yellow, 19% black.