#128C28
Closest named color: Forest Green (#228B22). oklch(55.8% 0.17 144.8), rgb(18, 140, 40).
Aa
Black text reads best on this color (4.80:1).
About this color
#128C28 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.170 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.006 away. Black text reads best on it, at 4.80:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.80:1 |
| White text | 4.36:1 |
Values
| HEX | #128C28 |
| RGB | rgb(18, 140, 40) |
| HSL | hsl(131, 77%, 31%) |
| OKLCH | oklch(55.8% 0.17 144.8) |
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 #128C28 | 4.36:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #128C28 | 4.80:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #128C28 text on white | 4.36:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #128C28 text on black | 4.80:1 | AA | Lc -32.0 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E1EEE1
oklch(93.6% 0.022 145.4)
-
Step 200
200
#C9E1C8
oklch(88.5% 0.042 144.1)
-
Step 300
300
#A2CEA2
oklch(80.8% 0.077 144.8)
-
Step 400
400
#6DB56F
oklch(70.8% 0.124 144.7)
-
Step 500
500
#40A148
oklch(63.1% 0.156 144.9)
-
Step 600
600 (this color)
#128C28
oklch(55.8% 0.17 144.8)
-
Step 700
700
#00761B
oklch(49.2% 0.156 144.8)
-
Step 800
800
#076018
oklch(42.6% 0.131 144.9)
-
Step 900
900
#154F1B
oklch(37.8% 0.102 144.8)
-
Step 950
950
#0E2E11
oklch(26.9% 0.064 145.2)
#128C28 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) | #8F7E19 | 0.126 |
| Deuteranopia (no green cones) | #827532 | 0.126 |
| Tritanopia (no blue cones) | #008878 | 0.106 |
| Achromatopsia (no color) | #797979 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128C28
#128C28
oklch(55.8% 0.17 144.8)
- #A349AA
#A349AA
oklch(55.8% 0.17 324.7)
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 #128C28, closest first.
No curated palette has a color within ΔE 0.04 of #128C28.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.006
- Emerald Green #028F1E ΔE 0.013
- Kelley Green #009337 ΔE 0.021
- Irish Green #019529 ΔE 0.027
- True Green #089404 ΔE 0.033
- Dark Grass Green #388004 ΔE 0.036
- Green #008000 ΔE 0.040
- Tree Green #2A7E19 ΔE 0.040
Use #128C28 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.