Orange (#FFA500) is a light, highly saturated orange hue. The CSS orange keyword is warm and friendly, often used for calls to action and warnings that are less severe than red.
In RGB it is made of 255 red, 165 green and 0 blue. Its HSL hue angle is 39° with 100% saturation and 50% lightness, while its perceptual OKLCH lightness is 79% with a chroma of 0.171. For print, a starting CMYK mix is 0% cyan, 35% magenta, 100% yellow and 0% black.
As a text color on white, Orange has a contrast ratio of 1.97:1, which fails WCAG AA even for large text. On black it reaches 10.63:1 and passes AA for normal text. If you use Orange as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 66 for black text and Lc -42 for white text.
Its perceptual complement is #85C0FF, close to baby blue. Colors that look most similar are amber, tangerine, coral. It looks fairly similar to people with red-green color blindness (ΔE 9), so its meaning mostly survives.