#128C3D
Closest named color: Forest Green (#228B22). oklch(56.1% 0.153 148.8), rgb(18, 140, 61).
Aa
Black text reads best on this color (4.84:1).
About this color
#128C3D is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.153 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.023 away. Black text reads best on it, at 4.84:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #128C3D |
| RGB | rgb(18, 140, 61) |
| HSL | hsl(141, 77%, 31%) |
| OKLCH | oklch(56.1% 0.153 148.8) |
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 #128C3D | 4.33:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #128C3D | 4.84:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #128C3D text on white | 4.33:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #128C3D text on black | 4.84:1 | AA | Lc -32.2 | 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
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E1EEE3
oklch(93.6% 0.02 150.1)
-
Step 200
200
#C9E1CC
oklch(88.6% 0.038 148.9)
-
Step 300
300
#A2CEA8
oklch(81% 0.07 148.6)
-
Step 400
400
#6DB47A
oklch(70.8% 0.111 148.8)
-
Step 500
500
#40A057
oklch(63.1% 0.141 148.7)
-
Step 600
600 (this color)
#128C3D
oklch(56.1% 0.153 148.8)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#066027
oklch(42.8% 0.118 148.8)
-
Step 900
900
#144E24
oklch(37.6% 0.092 148.8)
-
Step 950
950
#0E2E16
oklch(27% 0.058 149.2)
#128C3D 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) | #8D7F36 | 0.122 |
| Deuteranopia (no green cones) | #807643 | 0.121 |
| Tritanopia (no blue cones) | #00897A | 0.088 |
| Achromatopsia (no color) | #797979 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128C3D
#128C3D
oklch(56.1% 0.153 148.8)
- #A44EA0
#A44EA0
oklch(56.1% 0.154 329.2)
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 #128C3D, closest first.
No curated palette has a color within ΔE 0.04 of #128C3D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.023
- Kelley Green #009337 ΔE 0.024
- Emerald Green #028F1E ΔE 0.031
- Jungle Green #048243 ΔE 0.034
- Irish Green #019529 ΔE 0.037
- Sea Green #2E8B57 ΔE 0.038
- Dark Grass Green #388004 ΔE 0.043
- Tree Green #2A7E19 ΔE 0.044
Use #128C3D 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.