Sea Green (#2E8B57) is a medium, moderately saturated green hue. Sea green is a medium blue-green reminiscent of shallow coastal water.
In RGB it is made of 46 red, 139 green and 87 blue. Its HSL hue angle is 146° with 50% saturation and 36% lightness, while its perceptual OKLCH lightness is 57% with a chroma of 0.119. For print, a starting CMYK mix is 67% cyan, 0% magenta, 37% yellow and 45% black.
As a text color on white, Sea Green has a contrast ratio of 4.25:1, which passes AA only for large text and UI parts. On black it reaches 4.95:1 and passes AA for normal text. If you use Sea Green as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 35 for black text and Lc -74 for white text.
Its perceptual complement is #A15A93, close to plum. Colors that look most similar are forest green, teal, green. It looks fairly similar to people with red-green color blindness (ΔE 10), so its meaning mostly survives.