#128D41
Closest named color: Kelley Green (#009337). oklch(56.4% 0.151 149.7), rgb(18, 141, 65).
Aa
Black text reads best on this color (4.91:1).
About this color
#128D41 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.151 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelley Green (#009337), ΔE 0.024 away. Black text reads best on it, at 4.91:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Kelley Green (#009337) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #128D41 |
| RGB | rgb(18, 141, 65) |
| HSL | hsl(143, 77%, 31%) |
| OKLCH | oklch(56.4% 0.151 149.7) |
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 #128D41 | 4.27:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #128D41 | 4.91:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #128D41 text on white | 4.27:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #128D41 text on black | 4.91:1 | AA | Lc -32.7 | 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
#E1EEE3
oklch(93.6% 0.02 150.1)
-
Step 200
200
#C9E1CC
oklch(88.6% 0.038 148.9)
-
Step 300
300
#A2CDAA
oklch(80.8% 0.067 150.2)
-
Step 400
400
#6DB47C
oklch(70.8% 0.109 149.7)
-
Step 500
500
#3FA05A
oklch(63.1% 0.138 149.8)
-
Step 600
600 (this color)
#128D41
oklch(56.4% 0.151 149.7)
-
Step 700
700
#007532
oklch(49.1% 0.137 149.6)
-
Step 800
800
#056029
oklch(42.8% 0.117 149.6)
-
Step 900
900
#144E26
oklch(37.6% 0.089 149.9)
-
Step 950
950
#0E2E17
oklch(27% 0.057 150.2)
#128D41 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) | #8E803A | 0.123 |
| Deuteranopia (no green cones) | #817747 | 0.121 |
| Tritanopia (no blue cones) | #008A7C | 0.086 |
| Achromatopsia (no color) | #7A7A7A | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128D41
#128D41
oklch(56.4% 0.151 149.7)
- #A550A0
#A550A0
oklch(56.5% 0.151 329.6)
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 #128D41, closest first.
No curated palette has a color within ΔE 0.04 of #128D41.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelley Green #009337 ΔE 0.024
- Forest Green #228B22 ΔE 0.027
- Emerald Green #028F1E ΔE 0.034
- Sea Green #2E8B57 ΔE 0.035
- Jungle Green #048243 ΔE 0.036
- Irish Green #019529 ΔE 0.038
- Fern Green #548D44 ΔE 0.045
- Dark Grass Green #388004 ΔE 0.048
Use #128D41 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.