Counter buttons color

Hello! Tell me please, how to change the color of the buttons at the counter?
The following example changes the color of the buttons but leaves a blue border. How to remove it?
https://snippet.webix.com/t061zx6w

Thank you very much!

Hello @Evgeniy !
Just use css property border-color

.mycounter .webix_inp_counter_next,
.mycounter .webix_inp_counter_prev {
    background-color: #2E7230;
    border-color: #2E7230;
}

https://snippet.webix.com/2xopbuxm

Of course, how can he not know… Thank you very much!