Medium Sea Green

Conversion

The same colour in each notation. OKLCH is the one to reach for when you intend to modify it, because its lightness axis is perceptually uniform and its three components are genuinely independent.

HEX

#3CB371

RGB

rgb(60 179 113)

OKLCH

oklch(68.4% 0.144 155.0)

Contrast and accessibility

What this colour passes as text, and — where it fails — the nearest colour that would pass while holding the same hue.

APCA scores it Lc 51 as 16px regular text on white. That is below the threshold for body copy at that size, even where the WCAG ratio passes.

Using Medium Sea Green

In OKLCH terms this is a green at 68% lightness and 0.14 chroma. Lightness is what decides every verdict below, which is why a colour can be perfect as a fill and unusable as the text on top of it.

• Body text on white2.66:1 is under the 4.5:1 minimum.no
• Body text on black7.87:1 clears the 4.5:1 minimum.yes
• Large text or headingsLarge text needs only 3:1, and this reaches 7.87:1 against black.yes
• Borders, icons and controlsClears the 3:1 that WCAG 1.4.11 asks of anything needed to identify a control.yes
• A background for white textWhite on this colour is 2.66:1.no

None of this makes a design accessible on its own. Contrast is one success criterion among many, and WCAG 1.4.1 separately requires that colour is never the only way information is conveyed — so if Medium Sea Green is carrying meaning here, give it a label or an icon as well.

Closest named colours

Ranked by CIEDE2000 perceptual distance, not by hex proximity. Two hex codes can look almost identical and sit far apart numerically, and the reverse.

• Dark Sea GreenΔE 10.7
• Medium AquamarineΔE 11.2
• Sea GreenΔE 12.7
• Lime GreenΔE 12.9
• Forest GreenΔE 15.5

Tints and shades

The same hue at eleven lightness steps, spaced evenly in OKLCH so they look evenly spaced. This is the family you would build a design system from.

Colour harmonies

Hue rotations around Medium Sea Green, computed in OKLCH so every colour in a set holds the same perceived lightness — which is what a harmony is supposed to mean and what the same rotation in HSL fails to deliver.

Colour vision

How Medium Sea Green appears under each simulated deficiency, using the Machado model applied to linear RGB.