Baby Blue (#89CFF0) is a light, highly saturated blue hue. Baby blue is a soft pastel blue associated with nurseries and gentle brands.
In RGB it is made of 137 red, 207 green and 240 blue. Its HSL hue angle is 199° with 77% saturation and 74% lightness, while its perceptual OKLCH lightness is 82% with a chroma of 0.084. For print, a starting CMYK mix is 43% cyan, 14% magenta, 0% yellow and 6% black.
As a text color on white, Baby Blue has a contrast ratio of 1.71:1, which fails WCAG AA even for large text. On black it reaches 12.25:1 and passes AA for normal text. If you use Baby Blue as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 73 for black text and Lc -35 for white text.
Its perceptual complement is #F2B494, close to dusty rose. Colors that look most similar are sky blue, powder blue, periwinkle. It looks fairly similar to people with red-green color blindness (ΔE 5), so its meaning mostly survives.