The Blue HTML Color Codes Group provides hex color codes that fit within the blue color group category.
CSS References | Color Names | Random Colors | Color Chart | Color Organization
Lavender Mist
Glitter
Periwinkle
Soap
Blue Bell
Wild Blue Yonder
Ceil
Medium Slate Blue
Manatee
Ube
Gray Blue
Ultramarine Blue
Majorelle Blue
Toolbox
Slate Blue
Iris
Bluebonnet
Rhythm
Palatinate Blue
Blue
Electric Ultramarine
Dark Blue Gray
Liberty
Violet Blue
Persian Blue
Medium Blue
Purple Navy
Blue (Pigment)
Dark Slate Blue
Independence
Egyptian Blue
Zaffre
Duke Blue
St Patrick Blue
Ultramarine
Imperial Blue
Royal Blue (Web)
Dark Blue
Phthalo Blue
Midnight Blue
Navy Blue
Space Cadet
Pakistan Green
Dark Powder Blue
Dark Midnight Blue
Note: Color names are subjective, therefore, a single name could potentially represent a multitude of hex color values.