#428F3B
Closest named color: Fern Green (#548D44). oklch(58.2% 0.142 142), rgb(66, 143, 59).
Aa
Black text reads best on this color (5.22:1).
About this color
#428F3B is a medium-dark, vivid green. In OKLCH its lightness is 58%, its chroma 0.142 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 5.22:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.22:1 |
| White text | 4.02:1 |
Values
| HEX | #428F3B |
| RGB | rgb(66, 143, 59) |
| HSL | hsl(115, 42%, 40%) |
| OKLCH | oklch(58.2% 0.142 142) |
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 #428F3B | 4.02:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #428F3B | 5.22:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #428F3B text on white | 4.02:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #428F3B text on black | 5.22:1 | AA | Lc -34.5 | 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
#E3EDE2
oklch(93.6% 0.018 142.8)
-
Step 200
200
#CCE0CA
oklch(88.6% 0.037 142.7)
-
Step 300
300
#AACCA6
oklch(81% 0.064 142.2)
-
Step 400
400
#7BB175
oklch(70.7% 0.103 142)
-
Step 500
500
#579D50
oklch(63.1% 0.131 142)
-
Step 600
600 (this color)
#428F3B
oklch(58.2% 0.142 142)
-
Step 700
700
#2B7225
oklch(49% 0.132 142)
-
Step 800
800
#265D21
oklch(42.7% 0.108 142)
-
Step 900
900
#244D20
oklch(37.8% 0.086 142)
-
Step 950
950
#162D13
oklch(27% 0.055 141.5)
#428F3B 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) | #928333 | 0.101 |
| Deuteranopia (no green cones) | #887C41 | 0.101 |
| Tritanopia (no blue cones) | #388B7D | 0.093 |
| Achromatopsia (no color) | #7F7F7F | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428F3B
#428F3B
oklch(58.2% 0.142 142)
- #A15BAC
#A15BAC
oklch(58.2% 0.141 322)
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 #428F3B, 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
- Kelley Green #009337 ΔE 0.031
- Light Forest Green #4F9153 ΔE 0.032
- Mossy Green #638B27 ΔE 0.033
- Forest Green #228B22 ΔE 0.036
- Moss Green #658B38 ΔE 0.036
- Sea Green #2E8B57 ΔE 0.040
Use #428F3B 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.