Try this · No. 4 / 8
Colour memory.
Look at the colour for three seconds. Then pick it out of nine. It gets sneakier while you keep winning.
0in a row
Press the button and memorise what you see.
BEST STREAK: —
Why is this hard?
You do not store the colour itself, only a name for it: "that teal". Three seconds later your brain rebuilds a teal from the name, and the rebuild drifts. Lightness goes first, then hue.