#428A40
Closest named color: Fern Green (#548D44). oklch(56.9% 0.13 143.1), rgb(66, 138, 64).
Aa
Black text reads best on this color (4.94:1).
About this color
#428A40 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.130 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.022 away. Black text reads best on it, at 4.94:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 4.94:1 |
| White text | 4.25:1 |
Values
| HEX | #428A40 |
| RGB | rgb(66, 138, 64) |
| HSL | hsl(118, 37%, 40%) |
| OKLCH | oklch(56.9% 0.13 143.1) |
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 #428A40 | 4.25:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #428A40 | 4.94:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #428A40 text on white | 4.25:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #428A40 text on black | 4.94:1 | AA | Lc -32.5 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E4EDE3
oklch(93.7% 0.016 142.6)
-
Step 200
200
#CDDFCC
oklch(88.5% 0.032 143.8)
-
Step 300
300
#ABCBA9
oklch(80.9% 0.058 143.5)
-
Step 400
400
#7DB07A
oklch(70.7% 0.094 143.2)
-
Step 500
500
#5A9C58
oklch(63.1% 0.12 143.4)
-
Step 600
600 (this color)
#428A40
oklch(56.9% 0.13 143.1)
-
Step 700
700
#2F712E
oklch(49% 0.121 143.2)
-
Step 800
800
#285C27
oklch(42.5% 0.1 143.2)
-
Step 900
900
#264C24
oklch(37.7% 0.079 142.8)
-
Step 950
950
#172D16
oklch(27.2% 0.05 143.1)
#428A40 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) | #8D7F39 | 0.096 |
| Deuteranopia (no green cones) | #837845 | 0.095 |
| Tritanopia (no blue cones) | #388679 | 0.083 |
| Achromatopsia (no color) | #7B7B7B | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428A40
#428A40
oklch(56.9% 0.13 143.1)
- #9B5AA3
#9B5AA3
oklch(56.9% 0.13 323)
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 #428A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.022
- Sea Green #2E8B57 ΔE 0.028
- Light Forest Green #4F9153 ΔE 0.032
- Moss Green #658B38 ΔE 0.037
- Mossy Green #638B27 ΔE 0.038
- Sap Green #5C8B15 ΔE 0.038
- Forest Green #228B22 ΔE 0.040
- Kelley Green #009337 ΔE 0.042
Use #428A40 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.