#378E5E
Closest named color: Sea Green (#2E8B57). oklch(58.1% 0.112 156.1), rgb(55, 142, 94).
Aa
Black text reads best on this color (5.19:1).
About this color
#378E5E is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.112 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.014 away. Black text reads best on it, at 5.19:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #378E5E |
| RGB | rgb(55, 142, 94) |
| HSL | hsl(147, 44%, 39%) |
| OKLCH | oklch(58.1% 0.112 156.1) |
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 #378E5E | 4.04:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #378E5E | 5.19:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #378E5E text on white | 4.04:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #378E5E text on black | 5.19:1 | AA | Lc -34.3 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CBDFD1
oklch(88.5% 0.029 155.2)
-
Step 300
300
#A7CBB3
oklch(80.9% 0.051 155.9)
-
Step 400
400
#76B08C
oklch(70.7% 0.081 156.4)
-
Step 500
500
#4F9C6F
oklch(63.1% 0.103 156.2)
-
Step 600
600 (this color)
#378E5E
oklch(58.1% 0.112 156.1)
-
Step 700
700
#1F7247
oklch(49.2% 0.105 156.1)
-
Step 800
800
#1D5D3A
oklch(42.8% 0.087 155.6)
-
Step 900
900
#1F4C32
oklch(37.7% 0.067 155.8)
-
Step 950
950
#132D1E
oklch(27.1% 0.043 156.6)
#378E5E 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) | #8D835B | 0.101 |
| Deuteranopia (no green cones) | #817B61 | 0.098 |
| Tritanopia (no blue cones) | #148D81 | 0.053 |
| Achromatopsia (no color) | #7E7E7E | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378E5E
#378E5E
oklch(58.1% 0.112 156.1)
- #A45F94
#A45F94
oklch(58.1% 0.113 336.1)
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 #378E5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.014
- Viridian #1E9167 ΔE 0.015
- Light Forest Green #4F9153 ΔE 0.027
- Fern Green #548D44 ΔE 0.036
- Dark Sage #598556 ΔE 0.036
- Ocean Green #3D9973 ΔE 0.039
- Slate Green #658D6D ΔE 0.053
- Moss Green #658B38 ΔE 0.054
Use #378E5E 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.