https://daringfireball.net/linked/2007/05/23/colortest
Daring Fireball: 24- and 18-bit Color Test Images
18 bit colordaring fireball24 andtestimages
https://www.adafruit.com/product/1480
2.2 18-bit color TFT LCD display with microSD card breakout [EYESPI Connector] : Adafruit...
This lovely little display breakout is the best way to add a small, colorful, and bright display to any project. Since the display uses 4-wire SPI to...
https://www.adafruit.com/product/335
2.8 18-bit color TFT LCD with touchscreen breakout board [ILI9325] : Adafruit Industries, Unique &...
This screen has been discontinued, but we have a nearly identical replacement, the 2.8" ILI341 touchscreen breakout which as both 8-bit and SPI interface modes...