#688BF5 Hex Color

#688bf5 reads as a cool color because its saturated blue base carries a violet undertone. That combination gives it a crisp, energetic feel rather than the softness associated with warmer hues.

#688bf5 pairs well with navy, charcoal, white, and pale blue. Dark neutrals ground its high saturation, while light backgrounds keep it crisp; a muted sage accent adds warmth without overpowering it.

Black text on #688bf5 reaches about 6.6:1 contrast, passing WCAG AA for normal text, while white text is about 3.2:1 and should generally be reserved for larger text or checked in context.