Ok here is what I found.
There are three main categories of miniature single die LEDs:
Low-current — typically rated for 2 mA at around 2 V (approximately 4 mW consumption).
Standard — 20 mA LEDs at around 2 V (approximately 40 mW) for red, orange, yellow, and green, and 20 mA at 4–5 V (approximately 100 mW) for blue, violet, and white.
Ultra-high-output — 20 mA at approximately 2 V or 4–5 V, designed for viewing in direct sunlight.Five- and twelve-volt LEDs are ordinary miniature LEDs that incorporate a suitable series resistor for direct connection to a 5 V or 12 V supply.
So using this and an LED calculator, the resistance should be about 100-150 ohms, @ 5 volts.
Those resistor values should work fine. the 3rd led you can bring down a little, depending on how bright you want it.