All of our glow-in-the-dark inks are the color in daytime and glowing color. So for example, our blue is blue in normal light, and blue when it is glowing!
As for length of time the inks glow, this ranges from 30 minutes to 4+ hours. It is variable depending on the time the ink has been exposed to light (sunlight, household light, etc.). UV light creates the strongest and brightest effect.
Below are our available standard inks. Custom PMS matching is available for additional mixing charge.