#378D42
Closest named color: Fern Green (#548D44). oklch(57.3% 0.138 145.8), rgb(55, 141, 66).
Aa
Black text reads best on this color (5.05:1).
About this color
#378D42 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.138 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.026 away. Black text reads best on it, at 5.05:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #378D42 |
| RGB | rgb(55, 141, 66) |
| HSL | hsl(128, 44%, 38%) |
| OKLCH | oklch(57.3% 0.138 145.8) |
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 #378D42 | 4.15:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #378D42 | 5.05:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #378D42 text on white | 4.15:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #378D42 text on black | 5.05:1 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E3EDE3
oklch(93.6% 0.017 145.4)
-
Step 200
200
#CBE0CC
oklch(88.6% 0.035 146.6)
-
Step 300
300
#A8CCA9
oklch(80.9% 0.062 145.7)
-
Step 400
400
#77B17B
oklch(70.6% 0.099 146.1)
-
Step 500
500
#519D58
oklch(63% 0.127 145.8)
-
Step 600
600 (this color)
#378D42
oklch(57.3% 0.138 145.8)
-
Step 700
700
#23732F
oklch(49.1% 0.128 145.8)
-
Step 800
800
#1F5E28
oklch(42.8% 0.107 145.9)
-
Step 900
900
#204D25
oklch(37.7% 0.083 145.9)
-
Step 950
950
#142D16
oklch(27% 0.052 145.6)
#378D42 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) | #8F813B | 0.106 |
| Deuteranopia (no green cones) | #847947 | 0.106 |
| Tritanopia (no blue cones) | #248A7C | 0.083 |
| Achromatopsia (no color) | #7C7C7C | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378D42
#378D42
oklch(57.3% 0.138 145.8)
- #A158A4
#A158A4
oklch(57.4% 0.138 325.7)
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 #378D42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.026
- Sea Green #2E8B57 ΔE 0.028
- Kelley Green #009337 ΔE 0.032
- Light Forest Green #4F9153 ΔE 0.033
- Forest Green #228B22 ΔE 0.035
- Sap Green #5C8B15 ΔE 0.041
- Mossy Green #638B27 ΔE 0.043
- Moss Green #658B38 ΔE 0.043
Use #378D42 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.