#128F39
Closest named color: Kelley Green (#009337). oklch(56.9% 0.16 147.6), rgb(18, 143, 57).
Aa
Black text reads best on this color (5.01:1).
About this color
#128F39 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.160 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelley Green (#009337), ΔE 0.013 away. Black text reads best on it, at 5.01:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Kelley Green (#009337) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #128F39 |
| RGB | rgb(18, 143, 57) |
| HSL | hsl(139, 78%, 32%) |
| OKLCH | oklch(56.9% 0.16 147.6) |
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 #128F39 | 4.18:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #128F39 | 5.01:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #128F39 text on white | 4.18:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #128F39 text on black | 5.01:1 | AA | Lc -33.4 | 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
#C8E1CA
oklch(88.5% 0.041 147.5)
-
Step 300
300
#A2CEA6
oklch(80.9% 0.073 147.3)
-
Step 400
400
#6CB476
oklch(70.6% 0.116 147.5)
-
Step 500
500
#3EA152
oklch(63.2% 0.148 147.5)
-
Step 600
600 (this color)
#128F39
oklch(56.9% 0.16 147.6)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#026022
oklch(42.7% 0.124 147.6)
-
Step 900
900
#134F21
oklch(37.8% 0.097 147.5)
-
Step 950
950
#0E2E14
oklch(26.9% 0.06 147.5)
#128F39 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) | #918130 | 0.127 |
| Deuteranopia (no green cones) | #847840 | 0.126 |
| Tritanopia (no blue cones) | #008C7C | 0.094 |
| Achromatopsia (no color) | #7C7C7C | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128F39
#128F39
oklch(56.9% 0.16 147.6)
- #A74FA6
#A74FA6
oklch(56.9% 0.159 327.8)
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 #128F39, closest first.
No curated palette has a color within ΔE 0.04 of #128F39.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelley Green #009337 ΔE 0.013
- Forest Green #228B22 ΔE 0.019
- Emerald Green #028F1E ΔE 0.024
- Irish Green #019529 ΔE 0.026
- True Green #089404 ΔE 0.039
- Sea Green #2E8B57 ΔE 0.045
- Jungle Green #048243 ΔE 0.045
- Dark Grass Green #388004 ΔE 0.047
Use #128F39 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.