Nail the exact color blue purple in your design by using the code from any one of these systems for color identification.
|RGB||r: 138, g: 43, b: 226|
|HSL||h: 271°, s: 76%, l: 53%|
|HSV||h: 271°, s: 81%, v: 89%|
|CMYK||c: 39%, m: 81%, y: 0%, k: 11%|
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 purple is made of 54% red, 17% green, and 89% blue.
If you're identifying color for a print project, you're most likely using a CMYK colorspace—the percentages are 39% cyan, 81% magenta, 0% yellow, 11% black.