#138F1B
Closest named color: Emerald Green (#028F1E). oklch(56.6% 0.181 143.3), rgb(19, 143, 27).
Aa
Black text reads best on this color (4.97:1).
About this color
#138F1B is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.181 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.003 away. Black text reads best on it, at 4.97:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 4.97:1 |
| White text | 4.22:1 |
Values
| HEX | #138F1B |
| RGB | rgb(19, 143, 27) |
| HSL | hsl(124, 77%, 32%) |
| OKLCH | oklch(56.6% 0.181 143.3) |
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 #138F1B | 4.22:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #138F1B | 4.97:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #138F1B text on white | 4.22:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #138F1B text on black | 4.97:1 | AA | Lc -33.1 | 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
#E1EEE0
oklch(93.6% 0.023 143.4)
-
Step 200
200
#C8E1C6
oklch(88.4% 0.045 143.2)
-
Step 300
300
#A2CF9F
oklch(81% 0.082 143.2)
-
Step 400
400
#6CB569
oklch(70.6% 0.13 143.2)
-
Step 500
500
#3EA23E
oklch(63.2% 0.167 143.3)
-
Step 600
600 (this color)
#138F1B
oklch(56.6% 0.181 143.3)
-
Step 700
700
#00760C
oklch(49.1% 0.163 143.2)
-
Step 800
800
#04610C
oklch(42.8% 0.139 143.3)
-
Step 900
900
#134F14
oklch(37.6% 0.108 143.3)
-
Step 950
950
#0E2F0E
oklch(27.2% 0.069 143.4)
#138F1B 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) | #928100 | 0.129 |
| Deuteranopia (no green cones) | #857829 | 0.128 |
| Tritanopia (no blue cones) | #008B7A | 0.116 |
| Achromatopsia (no color) | #7B7B7B | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138F1B
#138F1B
oklch(56.6% 0.181 143.3)
- #A748B2
#A748B2
oklch(56.7% 0.181 323.4)
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 #138F1B, closest first.
No curated palette has a color within ΔE 0.04 of #138F1B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.003
- Forest Green #228B22 ΔE 0.014
- Irish Green #019529 ΔE 0.018
- True Green #089404 ΔE 0.019
- Kelley Green #009337 ΔE 0.021
- Dark Grass Green #388004 ΔE 0.044
- Green #008000 ΔE 0.046
- Grass Green #3F9B0B ΔE 0.047
Use #138F1B 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.