Yes. According to GM Authority here are the color breakdowns:
An thorough comparison performed by GM Authority reveals that GM’s all-new full-size trucks share ten of the same exterior colors, with one unique hue.
Shared Colors
2019 Silverado 1500 vs. 2019 Sierra 1500 - Shared Colors
Silverado Color Name
Color Code
Touch-Up Paint Number
Sierra Color Name
Iridescent Pearl Tricoat
G1W
WA-140X
White Frost Tricoat
Havana Brown Metallic
G2X
WA-439C
Deep Mahogany Metallic
Red Hot
G7C
WA-130X
Cardinal Red
Satin Steel Metallic
G9K
WA-464C
Satin Steel Metallic
Northsky Blue Metallic
GA0
WA-619D
Pacific Blue Metallic
Silver Ice Metallic
GAN
WA-636R
Quicksilver Metallic
Summit White
GAZ
WA-8624
Summit White
Black
GBA
WA-8555
Onyx Black
Shadow Gray Metallic
GJI
WA-626D
Dark Sky Metallic
Cajun Red Tintcoat
GPJ
WA-434B
Red Quartz Tintcoat
Chevy and GMC have different names for some of the ten colors they share, but the hues are the same – as evidenced by identical color codes and touch-up paint numbers.
Different Colors
The one different color is Oakwood Metallic on the Silverado and Smokey Quartz Metallic on the Sierra. Not only do the two colors have different names, but they also have different color codes and touch-up paint numbers.
2019 Silverado 1500 vs. 2019 Sierra 1500 - Different Colors
Color/Vehicle
Silverado
Sierra
Color Name
Oakwood Metallic
Smokey Quartz Metallic
Color Code
GE0
GS6
Touch Up Paint Number
WA-623D
WA-634D
Read more: http://gmauthority.com/blog/2018/04/2019-silverado-and-2019-sierra-share-all-but-one-colors/#ixzz5SJgI3V8V