A blue suit with a patterned tie shows a large quieter main colour beside many smaller pale forms here. The overlapping waistcoat also belongs to the blue area. A tie with leaf-like motifs lies over the pale shirt. A small pocket square and rounded lapel detail pick up parts of that colour idea. Compare the scale: substantial blue as a foundation, with smaller pale repetitions centrally and beside it.
If this distribution appeals, try just one patterned companion first. Leave the pocket square aside and check whether the tie already supplies the accent you want. Add the square next and compare again from conversation distance. Keeping the blue main colour does not require repeating every motif in several places. This is a decision about visible distribution.
The crop ends above the shoes, so plan their colour on the actual complete outfit. Ask whether you like the overlapping waistcoat front independently of blue too. Another waistcoat need not abandon the main colour, but it would alter the visible centre. Inspect real available versions rather than assumed combinations.