#378C56
Closest named color: Sea Green (#2E8B57). oklch(57.4% 0.117 152.8), rgb(55, 140, 86).
Aa
Black text reads best on this color (5.04:1).
About this color
#378C56 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.117 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 0.007 away. Black text reads best on it, at 5.04:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #378C56 |
| RGB | rgb(55, 140, 86) |
| HSL | hsl(142, 44%, 38%) |
| OKLCH | oklch(57.4% 0.117 152.8) |
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 #378C56 | 4.16:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #378C56 | 5.04:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #378C56 text on white | 4.16:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #378C56 text on black | 5.04:1 | AA | Lc -33.3 | 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
#E3EDE5
oklch(93.6% 0.015 151.8)
-
Step 200
200
#CBDFD0
oklch(88.5% 0.029 153.3)
-
Step 300
300
#A8CBB1
oklch(80.9% 0.052 153)
-
Step 400
400
#77B087
oklch(70.6% 0.085 152.6)
-
Step 500
500
#519C6A
oklch(63.1% 0.107 153)
-
Step 600
600 (this color)
#378C56
oklch(57.4% 0.117 152.8)
-
Step 700
700
#227241
oklch(49.1% 0.109 152.6)
-
Step 800
800
#1F5D36
oklch(42.8% 0.091 152.6)
-
Step 900
900
#204C2F
oklch(37.6% 0.07 152.7)
-
Step 950
950
#142D1C
oklch(27.1% 0.045 152.8)
#378C56 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) | #8C8152 | 0.101 |
| Deuteranopia (no green cones) | #817959 | 0.100 |
| Tritanopia (no blue cones) | #1B8A7E | 0.060 |
| Achromatopsia (no color) | #7C7C7C | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378C56
#378C56
oklch(57.4% 0.117 152.8)
- #A15D96
#A15D96
oklch(57.5% 0.116 333.1)
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 #378C56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.007
- Viridian #1E9167 ΔE 0.023
- Light Forest Green #4F9153 ΔE 0.027
- Fern Green #548D44 ΔE 0.031
- Dark Sage #598556 ΔE 0.036
- Jungle Green #048243 ΔE 0.046
- Ocean Green #3D9973 ΔE 0.049
- Moss Green #658B38 ΔE 0.050
Use #378C56 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.