Wrong message on color not legible - Tested contrast with another tool OK

I was using the color 00BCD4 on white background
who has a contrast ratio of 2,29
without alert by glide.

I do not understand why when using 0e2356 on white glide shows a “color not legible” message , testing this the contrast ratio is a superb 15.07

Please, could you explain me why ?

Hereafter screenshoots on contrast ratio testing :