Reproduction steps:

1. Open "1155719" project and "1" scene
2. Enter Play mode
3. Notice how the GUI is rendered
4. Build & Run for Android
5. Notice how the GUI is rendered

Expected Result: GUI color is the same in Android as in the Editor
Actual Result: GUI color is different in Android

Reproduced with: 2019.3.0a5, 2019.2.0b5, 2019.1.6f1. 2018.4.2f1, 2018.3.14f1
Did not reproduce on: 2017.4.28f1 (No PackMan)

Note:
Reproduces on both LWRP and HDRP

Repro Devices:
VLNQA00315, Samsung Galaxy Note10 (SM-N970U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00255, Samsung Galaxy Note3 Neo (SM-N7505), Android 4.4.2, CPU: Exynos 5 Hexa 5260, GPU: Mali-T624
VLNQA00002, Samsung Galaxy S5 Neo (SM-G903F), Android 6.0.1, CPU: Exynos 7 Octa 7580, GPU: Mali-T720
VLNQA00098, Lge LG G4 (LG-H815), Android 6.0, CPU: Snapdragon 808 MSM8992, GPU: Adreno (TM) 418
VLNQA00104, Lge Nexus 5 (Nexus 5), Android 6.0.1, CPU: Snapdragon 800 MSM8974, GPU: Adreno (TM) 330
VLNQA00115, Sony Xperia Z3 (D6603), Android 6.0.1, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330
VLNQA00036, Motorola Moto G (1st Gen) (XT1032), Android 5.1, CPU: Snapdragon 400 MSM8226, GPU: Adreno (TM) 305
VLNQA00086, Sony Xperia Z4 Tablet (SGP771), Android 7.1.1, CPU: Snapdragon 810 MSM8994, GPU: Adreno (TM) 430
VLNQA00063, Acer Iconia Tab 8 (A1-840FHD), Android 4.4.2, CPU: Intel Atom Z3745, GPU: Intel(R) HD Graphics for BayTrail
VLNQA00062, Asus MeMO Pad 8 (ME181C) (K011), Android 4.4.2, CPU: Intel Atom Z3745, GPU: Intel(R) HD Graphics for BayTrail
VLNQA00155, Meizu PRO 7 Plus (PRO 7 Plus), Android 7.0, CPU: MediaTek Helio X30 MT6799, GPU: PowerVR Rogue GT7400 Plus
VLNQA00007, Samsung Galaxy S7 (SM-G930V), Android 6.0.1, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530

No Repro Devices:
VLNQA00124, Google Pixel 2 XL (Pixel 2 XL), Android 9, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00272, Samsung Galaxy S10+ (SM-G975U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00218, Samsung Galaxy Note9 (SM-N960U), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00216, Razer Phone 2 (Phone 2), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630