One of the other ways to wear bright chinos is to combine them with a relatively conservative, but still colourful, top half.
Pink works very well with green (think how beautiful ripe rhubarb looks) and this can help perk up the hackneyed and often rather dull blazer-and-chino fix. Throwing a yellow square into the mix means that the jacket has it's work cut out to keep the party at a healthy, comfortable decibel level. You could go ultra-safe and plump for a plain white but you're already playing when in pink and bright green - a bright square looks right at home.
A club-stripe tie is preppy but also a nice balance; they tend to look a little 'clubby' and snooty when worn with bland suits. Wearing them with such a riot of colours makes the stripe less about it's elite identity or meaning and more about the colours on display.
Shoes - Nunes Correa
Chinos - Gant
Blazer - Uniqlo (buttons added)
Shirt - Charles Tyrwhitt
Tie - Ede & Ravenscroft
Pocket square - Tie Rack