#138D5F
Closest named color: Sea Green (#2E8B57). oklch(57% 0.123 160.8), rgb(19, 141, 95).
Aa
Black text reads best on this color (5.00:1).
About this color
#138D5F is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.123 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.013 away. Black text reads best on it, at 5.00:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #138D5F |
| RGB | rgb(19, 141, 95) |
| HSL | hsl(157, 76%, 31%) |
| OKLCH | oklch(57% 0.123 160.8) |
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 #138D5F | 4.19:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #138D5F | 5.00:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #138D5F text on white | 4.19:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #138D5F text on black | 5.00:1 | AA | Lc -33.2 | 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
#E1EDE6
oklch(93.5% 0.016 160.6)
-
Step 200
200
#C8E0D3
oklch(88.5% 0.031 162.1)
-
Step 300
300
#A2CCB5
oklch(80.9% 0.055 160.9)
-
Step 400
400
#6CB28F
oklch(70.7% 0.088 161.2)
-
Step 500
500
#3E9E73
oklch(63% 0.112 161.1)
-
Step 600
600 (this color)
#138D5F
oklch(57% 0.123 160.8)
-
Step 700
700
#00734C
oklch(49.1% 0.109 161.2)
-
Step 800
800
#025E3D
oklch(42.6% 0.094 160.7)
-
Step 900
900
#134D34
oklch(37.6% 0.073 160.6)
-
Step 950
950
#0E2D1F
oklch(26.9% 0.046 161.4)
#138D5F 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) | #8B825C | 0.116 |
| Deuteranopia (no green cones) | #7D7862 | 0.112 |
| Tritanopia (no blue cones) | #008D81 | 0.051 |
| Achromatopsia (no color) | #7C7C7C | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138D5F
#138D5F
oklch(57% 0.123 160.8)
- #A7588D
#A7588D
oklch(57.1% 0.123 341.1)
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 #138D5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.013
- Viridian #1E9167 ΔE 0.016
- Light Forest Green #4F9153 ΔE 0.042
- Jungle Green #048243 ΔE 0.045
- Fern Green #548D44 ΔE 0.049
- Dark Sage #598556 ΔE 0.049
- Ocean Green #3D9973 ΔE 0.050
- Kelley Green #009337 ΔE 0.058
Use #138D5F 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.