Creating a VGA video signal from FPGA pins
Pins 13 and 14 of the VGA connector (HS and VS) are digital signals, so can be driven directly from two FPGA pins.

Pins 1, 2 and 3 (R, G and B) are 75Ω analog signals. With 3.3V IOs, use three 270Ω series resistors. The resistors form voltage dividers with the 75Ω resistors in the monitor inputs so that 3.3V become 3.3*75/(270+75)=0.72V, pretty close to 0.7V.
Driving these 3 pins with different combinations of 0's and 1's gives us up to 8 colors.

Ground pins are pins 5, 6, 7, 8 and 10.

Here's a view of the female VGA connector connected to Pluto on a breadboard.
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