#428E5E
Closest named color: Sea Green (#2E8B57). oklch(58.5% 0.106 153.8), rgb(66, 142, 94).
Aa
Black text reads best on this color (5.26:1).
About this color
#428E5E is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.106 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.021 away. Black text reads best on it, at 5.26:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.26:1 |
| White text | 3.99:1 |
Values
| HEX | #428E5E |
| RGB | rgb(66, 142, 94) |
| HSL | hsl(142, 37%, 41%) |
| OKLCH | oklch(58.5% 0.106 153.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #428E5E | 3.99:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #428E5E | 5.26:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #428E5E text on white | 3.99:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #428E5E text on black | 5.26:1 | AA | Lc -34.6 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CCDFD1
oklch(88.6% 0.028 153.8)
-
Step 300
300
#AACAB3
oklch(80.9% 0.047 154)
-
Step 400
400
#7BAF8B
oklch(70.7% 0.076 153.9)
-
Step 500
500
#579B6E
oklch(63.2% 0.098 153.7)
-
Step 600
600 (this color)
#428E5E
oklch(58.5% 0.106 153.8)
-
Step 700
700
#2A7146
oklch(49.2% 0.099 153.8)
-
Step 800
800
#255C3A
oklch(42.8% 0.081 153.9)
-
Step 900
900
#234B32
oklch(37.6% 0.063 154.5)
-
Step 950
950
#162C1D
oklch(27% 0.04 153.2)
#428E5E with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #8E845B | 0.094 |
| Deuteranopia (no green cones) | #837C61 | 0.092 |
| Tritanopia (no blue cones) | #2E8C81 | 0.054 |
| Achromatopsia (no color) | #7F7F7F | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428E5E
#428E5E
oklch(58.5% 0.106 153.8)
- #A16396
#A16396
oklch(58.5% 0.105 333.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #428E5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.021
- Viridian #1E9167 ΔE 0.021
- Light Forest Green #4F9153 ΔE 0.022
- Dark Sage #598556 ΔE 0.030
- Fern Green #548D44 ΔE 0.032
- Ocean Green #3D9973 ΔE 0.036
- Slate Green #658D6D ΔE 0.045
- Moss Green #658B38 ΔE 0.049
Use #428E5E in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.