#128B49
Closest named color: Sea Green (#2E8B57). oklch(56% 0.141 152.3), rgb(18, 139, 73).
Aa
Black text reads best on this color (4.81:1).
About this color
#128B49 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.141 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.025 away. Black text reads best on it, at 4.81:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #128B49 |
| RGB | rgb(18, 139, 73) |
| HSL | hsl(147, 77%, 31%) |
| OKLCH | oklch(56% 0.141 152.3) |
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 #128B49 | 4.36:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #128B49 | 4.81:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #128B49 text on white | 4.36:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #128B49 text on black | 4.81:1 | AA | Lc -32.0 | 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
#F1F7F3
oklch(97.1% 0.008 157.1)
-
Step 100
100
#E1EEE4
oklch(93.7% 0.019 152.8)
-
Step 200
200
#C9E0CE
oklch(88.5% 0.035 152)
-
Step 300
300
#A3CDAD
oklch(80.9% 0.063 152.1)
-
Step 400
400
#6DB381
oklch(70.7% 0.102 152.2)
-
Step 500
500
#409F62
oklch(63% 0.128 152.6)
-
Step 600
600 (this color)
#128B49
oklch(56% 0.141 152.3)
-
Step 700
700
#00743A
oklch(49% 0.128 152.4)
-
Step 800
800
#075F30
oklch(42.7% 0.108 152.5)
-
Step 900
900
#144E2A
oklch(37.7% 0.085 152.2)
-
Step 950
950
#0E2E19
oklch(27.1% 0.054 152.3)
#128B49 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) | #8B7E44 | 0.120 |
| Deuteranopia (no green cones) | #7E754E | 0.118 |
| Tritanopia (no blue cones) | #00897B | 0.074 |
| Achromatopsia (no color) | #797979 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128B49
#128B49
oklch(56% 0.141 152.3)
- #A35198
#A35198
oklch(56% 0.141 332.5)
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 #128B49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.025
- Jungle Green #048243 ΔE 0.028
- Kelley Green #009337 ΔE 0.036
- Forest Green #228B22 ΔE 0.038
- Viridian #1E9167 ΔE 0.041
- Fern Green #548D44 ΔE 0.045
- Emerald Green #028F1E ΔE 0.047
- Light Forest Green #4F9153 ΔE 0.048
Use #128B49 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.