#128B00
Closest named color: Emerald Green (#028F1E). oklch(55.3% 0.185 141.8), rgb(18, 139, 0).
Aa
Black text reads best on this color (4.71:1).
About this color
#128B00 is a medium-dark, vivid green. In OKLCH its lightness is 55%, its chroma 0.185 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.014 away. Black text reads best on it, at 4.71:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #128B00 |
| RGB | rgb(18, 139, 0) |
| HSL | hsl(112, 100%, 27%) |
| OKLCH | oklch(55.3% 0.185 141.8) |
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 #128B00 | 4.45:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #128B00 | 4.71:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #128B00 text on white | 4.45:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #128B00 text on black | 4.71:1 | AA | Lc -31.5 | 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
#E1EEDF
oklch(93.5% 0.024 141.5)
-
Step 200
200
#C9E1C5
oklch(88.4% 0.046 141.2)
-
Step 300
300
#A2CF9D
oklch(80.9% 0.084 142.2)
-
Step 400
400
#6EB565
oklch(70.7% 0.133 141.6)
-
Step 500
500
#41A237
oklch(63.2% 0.171 141.8)
-
Step 600
600 (this color)
#128B00
oklch(55.3% 0.185 141.8)
-
Step 700
700
#0E7600
oklch(49.2% 0.165 141.8)
-
Step 800
800
#0A6100
oklch(42.8% 0.143 141.7)
-
Step 900
900
#154F0F
oklch(37.6% 0.111 141.8)
-
Step 950
950
#0F2F0B
oklch(27.2% 0.071 141.5)
#128B00 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) | #8F7D00 | 0.131 |
| Deuteranopia (no green cones) | #82741B | 0.128 |
| Tritanopia (no blue cones) | #008675 | 0.123 |
| Achromatopsia (no color) | #777777 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128B00
#128B00
oklch(55.3% 0.185 141.8)
- #A243B1
#A243B1
oklch(55.3% 0.185 322)
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 #128B00, closest first.
No curated palette has a color within ΔE 0.04 of #128B00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.014
- Forest Green #228B22 ΔE 0.017
- True Green #089404 ΔE 0.027
- Irish Green #019529 ΔE 0.031
- Kelley Green #009337 ΔE 0.034
- Green #008000 ΔE 0.035
- Dark Grass Green #388004 ΔE 0.036
- Tree Green #2A7E19 ΔE 0.043
Use #128B00 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.