If you are willing to bet on model similarity then as per this the dell U2419HC should have an avg Delta E value of less than 2(lower the value better is the colour calibration)There is something called as Industry Standard Colour Calibration ? Acceptance ? A Day is Day for everyone and Night is Night for everyone. You cannot say a Day is what one perceives and could be night for other person
*cdn.cnetcontent.com/e7/54/e7547b1c-6738-47f5-a7af-125d36584293.pdf
Reviews on amazon suggests that LG 24MP88HV comes with factory colour calibration(to achieve this at home you will need a hardware colour calibration device like datacolor spyder) so again both are kind of similar unless you can find the avg Delta E value of LG 24MP88. Two monitors having similar Delta E value should produce similar colours.