Steel Blue (#4682B4) is a medium, moderately saturated blue hue. Steel blue is a greyish medium blue that feels technical and dependable.
In RGB it is made of 70 red, 130 green and 180 blue. Its HSL hue angle is 207° with 44% saturation and 49% lightness, while its perceptual OKLCH lightness is 59% with a chroma of 0.099. For print, a starting CMYK mix is 61% cyan, 28% magenta, 0% yellow and 29% black.
As a text color on white, Steel Blue has a contrast ratio of 4.11:1, which passes AA only for large text and UI parts. On black it reaches 5.11:1 and passes AA for normal text. If you use Steel Blue as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 36 for black text and Lc -74 for white text.
Its perceptual complement is #A57037, close to caramel. Colors that look most similar are cerulean, slate gray, teal. It looks fairly similar to people with red-green color blindness (ΔE 3), so its meaning mostly survives.