#128B33
Closest named color: Forest Green (#228B22). oklch(55.7% 0.161 146.7), rgb(18, 139, 51).
Aa
Black text reads best on this color (4.76:1).
About this color
#128B33 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.161 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.014 away. Black text reads best on it, at 4.76:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.161) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #128B33 |
| RGB | rgb(18, 139, 51) |
| HSL | hsl(136, 77%, 31%) |
| OKLCH | oklch(55.7% 0.161 146.7) |
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 #128B33 | 4.40:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #128B33 | 4.76:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #128B33 text on white | 4.40:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #128B33 text on black | 4.76:1 | AA | Lc -31.7 | 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
#E1EEE2
oklch(93.6% 0.021 147.6)
-
Step 200
200
#C9E1CA
oklch(88.6% 0.04 146.4)
-
Step 300
300
#A3CEA6
oklch(81% 0.072 146.7)
-
Step 400
400
#6EB475
oklch(70.7% 0.115 146.5)
-
Step 500
500
#41A150
oklch(63.2% 0.148 146.5)
-
Step 600
600 (this color)
#128B33
oklch(55.7% 0.161 146.7)
-
Step 700
700
#007526
oklch(49% 0.147 146.7)
-
Step 800
800
#086020
oklch(42.7% 0.124 146.6)
-
Step 900
900
#154F20
oklch(37.8% 0.097 146.7)
-
Step 950
950
#0F2E13
oklch(27% 0.061 146.2)
#128B33 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) | #8D7E29 | 0.123 |
| Deuteranopia (no green cones) | #80753B | 0.122 |
| Tritanopia (no blue cones) | #008878 | 0.095 |
| Achromatopsia (no color) | #787878 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128B33
#128B33
oklch(55.7% 0.161 146.7)
- #A24BA4
#A24BA4
oklch(55.6% 0.161 326.6)
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 #128B33, closest first.
No curated palette has a color within ΔE 0.04 of #128B33.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.014
- Kelley Green #009337 ΔE 0.023
- Emerald Green #028F1E ΔE 0.023
- Irish Green #019529 ΔE 0.034
- Dark Grass Green #388004 ΔE 0.036
- Jungle Green #048243 ΔE 0.037
- Tree Green #2A7E19 ΔE 0.038
- Green #008000 ΔE 0.042
Use #128B33 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.