Nail the exact color blue gray in your design by using the code from any one of these systems for color identification.
|RGB||r: 102, g: 153, b: 204|
|HSL||h: 210°, s: 50%, l: 60%|
|HSV||h: 210°, s: 50%, v: 80%|
|CMYK||c: 50%, m: 25%, y: 0%, k: 20%|
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, blue gray is made of 40% red, 60% green, and 80% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 50% cyan, 25% magenta, 0% yellow, 20% black.