#428C39
Closest named color: Fern Green (#548D44). oklch(57.3% 0.14 141.6), rgb(66, 140, 57).
Aa
Black text reads best on this color (5.04:1).
About this color
#428C39 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.140 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.023 away. Black text reads best on it, at 5.04:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #428C39 |
| RGB | rgb(66, 140, 57) |
| HSL | hsl(113, 42%, 39%) |
| OKLCH | oklch(57.3% 0.14 141.6) |
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 #428C39 | 4.16:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #428C39 | 5.04:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #428C39 text on white | 4.16:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #428C39 text on black | 5.04:1 | AA | Lc -33.2 | 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
#E3EDE2
oklch(93.6% 0.018 142.8)
-
Step 200
200
#CDDFCA
oklch(88.4% 0.034 141.2)
-
Step 300
300
#ABCBA6
oklch(80.9% 0.062 141.3)
-
Step 400
400
#7CB175
oklch(70.8% 0.102 141.6)
-
Step 500
500
#599C51
oklch(63% 0.128 141.7)
-
Step 600
600 (this color)
#428C39
oklch(57.3% 0.14 141.6)
-
Step 700
700
#2E7226
oklch(49.1% 0.13 141.6)
-
Step 800
800
#275D21
oklch(42.7% 0.108 141.7)
-
Step 900
900
#254C20
oklch(37.6% 0.084 141.5)
-
Step 950
950
#162D14
oklch(27% 0.053 142.3)
#428C39 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) | #8F8031 | 0.098 |
| Deuteranopia (no green cones) | #857A3F | 0.097 |
| Tritanopia (no blue cones) | #39887A | 0.091 |
| Achromatopsia (no color) | #7C7C7C | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428C39
#428C39
oklch(57.3% 0.14 141.6)
- #9D59A9
#9D59A9
oklch(57.3% 0.139 321.4)
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 #428C39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.023
- Sap Green #5C8B15 ΔE 0.031
- Forest Green #228B22 ΔE 0.033
- Mossy Green #638B27 ΔE 0.033
- Kelley Green #009337 ΔE 0.034
- Light Forest Green #4F9153 ΔE 0.035
- Moss Green #658B38 ΔE 0.036
- Sea Green #2E8B57 ΔE 0.037
Use #428C39 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.