Ivory (#FFFFF0) is a very light, highly saturated neutral. Ivory is a near-white with a faint yellow tint, popular for wedding invitations and premium paper.
In RGB it is made of 255 red, 255 green and 240 blue. Its HSL hue angle is 60° with 100% saturation and 97% lightness, while its perceptual OKLCH lightness is 100% with a chroma of 0.020. For print, a starting CMYK mix is 0% cyan, 0% magenta, 6% yellow and 0% black.
As a text color on white, Ivory has a contrast ratio of 1.01:1, which fails WCAG AA even for large text. On black it reaches 20.81:1 and passes AA for normal text. If you use Ivory as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 105 for black text and Lc 0 for white text.
Its perceptual complement is #FEFEFF, close to white. Colors that look most similar are white, off-white, beige. It looks fairly similar to people with red-green color blindness (ΔE 0), so its meaning mostly survives.