#138A4A
Closest named color: Sea Green (#2E8B57). oklch(55.7% 0.138 152.8), rgb(19, 138, 74).
Aa
Black text reads best on this color (4.76:1).
About this color
#138A4A is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.138 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.023 away. Black text reads best on it, at 4.76:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #138A4A |
| RGB | rgb(19, 138, 74) |
| HSL | hsl(148, 76%, 31%) |
| OKLCH | oklch(55.7% 0.138 152.8) |
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 #138A4A | 4.40:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #138A4A | 4.76:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #138A4A text on white | 4.40:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #138A4A text on black | 4.76:1 | AA | Lc -31.6 | 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
#A3CDAE
oklch(81% 0.062 152.9)
-
Step 400
400
#6EB383
oklch(70.8% 0.1 152.9)
-
Step 500
500
#419F63
oklch(63.1% 0.127 152.8)
-
Step 600
600 (this color)
#138A4A
oklch(55.7% 0.138 152.8)
-
Step 700
700
#00743B
oklch(49% 0.127 152.7)
-
Step 800
800
#085F31
oklch(42.7% 0.107 152.9)
-
Step 900
900
#154E2B
oklch(37.7% 0.084 152.6)
-
Step 950
950
#0F2E1A
oklch(27.1% 0.052 152.9)
#138A4A 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) | #8A7E45 | 0.118 |
| Deuteranopia (no green cones) | #7D744F | 0.118 |
| Tritanopia (no blue cones) | #00887B | 0.073 |
| Achromatopsia (no color) | #787878 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138A4A
#138A4A
oklch(55.7% 0.138 152.8)
- #A25196
#A25196
oklch(55.8% 0.138 333.1)
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 #138A4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.023
- Jungle Green #048243 ΔE 0.025
- Kelley Green #009337 ΔE 0.040
- Forest Green #228B22 ΔE 0.040
- Viridian #1E9167 ΔE 0.041
- Fern Green #548D44 ΔE 0.046
- Light Forest Green #4F9153 ΔE 0.049
- Emerald Green #028F1E ΔE 0.050
Use #138A4A 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.