#128C64
Closest named color: Viridian (#1E9167). oklch(56.9% 0.117 163.9), rgb(18, 140, 100).
Aa
Black text reads best on this color (4.96:1).
About this color
#128C64 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.117 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.016 away. Black text reads best on it, at 4.96:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #128C64 |
| RGB | rgb(18, 140, 100) |
| HSL | hsl(160, 77%, 31%) |
| OKLCH | oklch(56.9% 0.117 163.9) |
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 #128C64 | 4.23:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #128C64 | 4.96:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #128C64 text on white | 4.23:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #128C64 text on black | 4.96:1 | AA | Lc -32.9 | 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
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E1EDE7
oklch(93.5% 0.015 164.7)
-
Step 200
200
#C8E0D4
oklch(88.6% 0.03 164.2)
-
Step 300
300
#A2CCB7
oklch(80.9% 0.053 163.3)
-
Step 400
400
#6CB192
oklch(70.6% 0.084 163.9)
-
Step 500
500
#3E9E78
oklch(63.2% 0.108 164)
-
Step 600
600 (this color)
#128C64
oklch(56.9% 0.117 163.9)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#025E41
oklch(42.7% 0.091 163.7)
-
Step 900
900
#134D37
oklch(37.7% 0.07 163.6)
-
Step 950
950
#0E2D20
oklch(26.9% 0.044 163.2)
#128C64 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) | #898162 | 0.114 |
| Deuteranopia (no green cones) | #7B7767 | 0.110 |
| Tritanopia (no blue cones) | #008C81 | 0.044 |
| Achromatopsia (no color) | #7B7B7B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128C64
#128C64
oklch(56.9% 0.117 163.9)
- #A65988
#A65988
oklch(56.9% 0.116 344)
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 #128C64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.016
- Sea Green #2E8B57 ΔE 0.019
- Light Forest Green #4F9153 ΔE 0.047
- Dark Sage #598556 ΔE 0.048
- Jungle Green #048243 ΔE 0.049
- Ocean Green #3D9973 ΔE 0.050
- Fern Green #548D44 ΔE 0.054
- Dark Cyan #008B8B ΔE 0.061
Use #128C64 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.