#1B4965
#5FA8D3
#A8E0DE
#E4F1FF
#E4F1FF is a light, highly saturated white color, closest to Frost and near Frost and Lavender. In OKLCH it has 95% lightness and 0.02 chroma at hue 250°. White suggests space, cleanliness and clarity, which makes #E4F1FF a natural choice for backgrounds and breathing room. It appears in 4 ColorSwoop palettes.
#E4F1FFrgb(228, 241, 255)hsl(211, 100%, 95%)11, 5, 0, 0--frost1.15:1 white · 18.32:1 blackBlack text passes WCAG AA on #E4F1FF (18.32:1); white text does not (1.15:1).
For a calm scheme pair #E4F1FF with its analogous neighbors #E5FFFF and #E6E5FF; for contrast use its complement #FFF3E5 as a small accent, and anchor everything with a neutral such as #1F1F24.
--frost: #E4F1FF;
$frost: #E4F1FF;
colors: { 'frost': '#E4F1FF' }