The yellow area is restricted to the top area, and the lower part is blue. See the images for this screen that I've used in a project featured in the book Ultimate guide to informed wearables.
This uses the I2C protocol so you only need to connect SDA and SCL to your microcontroller.
I've used this screen for my fun timer glove project!
OLED Display Module 128X64, SSD1306
Interface type: IIC interface
Pin definition: GND, VCC, SCL, SDA
1:GND(OLED power supply)
2:VCC (OLED 3.3~5V)
3:SCL(OLED IIC Clock line)
4:SDA(OLED IIC Cable
The OLED module has a black circuit board.
The overall measurement is 25x25 mm.
On the back of the board is a small resistor that can be used for address select. You would have to desolder the resister and move it to the other 2 pads. This will then allow you to use a different address. (0x78 or 0x7A)
