#378C3E
Closest named color: Fern Green (#548D44). oklch(57% 0.14 144.9), rgb(55, 140, 62).
Aa
Black text reads best on this color (4.98:1).
About this color
#378C3E is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.140 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.029 away. Black text reads best on it, at 4.98:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #378C3E |
| RGB | rgb(55, 140, 62) |
| HSL | hsl(125, 44%, 38%) |
| OKLCH | oklch(57% 0.14 144.9) |
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 #378C3E | 4.21:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #378C3E | 4.98:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #378C3E text on white | 4.21:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #378C3E text on black | 4.98:1 | AA | Lc -32.9 | 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
#E3EDE2
oklch(93.6% 0.018 142.8)
-
Step 200
200
#CBE0CB
oklch(88.5% 0.036 145.3)
-
Step 300
300
#A8CCA8
oklch(80.9% 0.063 145)
-
Step 400
400
#78B179
oklch(70.6% 0.1 144.8)
-
Step 500
500
#529E56
oklch(63.2% 0.13 144.9)
-
Step 600
600 (this color)
#378C3E
oklch(57% 0.14 144.9)
-
Step 700
700
#24732C
oklch(49.1% 0.131 144.9)
-
Step 800
800
#205E26
oklch(42.8% 0.108 145)
-
Step 900
900
#214D23
oklch(37.7% 0.085 144.5)
-
Step 950
950
#142D15
oklch(26.9% 0.053 144.7)
#378C3E 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) | #8E8037 | 0.105 |
| Deuteranopia (no green cones) | #837844 | 0.106 |
| Tritanopia (no blue cones) | #26897A | 0.085 |
| Achromatopsia (no color) | #7B7B7B | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378C3E
#378C3E
oklch(57% 0.14 144.9)
- #9F57A4
#9F57A4
oklch(57% 0.139 324.8)
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 #378C3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.029
- Kelley Green #009337 ΔE 0.031
- Forest Green #228B22 ΔE 0.031
- Sea Green #2E8B57 ΔE 0.031
- Light Forest Green #4F9153 ΔE 0.037
- Sap Green #5C8B15 ΔE 0.040
- Emerald Green #028F1E ΔE 0.041
- Jungle Green #048243 ΔE 0.042
Use #378C3E 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.