#378F00
Closest named color: Emerald Green (#028F1E). oklch(57.3% 0.178 138.3), rgb(55, 143, 0).
Aa
Black text reads best on this color (5.09:1).
About this color
#378F00 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.178 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.021 away. Black text reads best on it, at 5.09:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #378F00 |
| RGB | rgb(55, 143, 0) |
| HSL | hsl(97, 100%, 28%) |
| OKLCH | oklch(57.3% 0.178 138.3) |
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 #378F00 | 4.12:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #378F00 | 5.09:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #378F00 text on white | 4.12:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #378F00 text on black | 5.09:1 | AA | Lc -33.8 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CBE1C4
oklch(88.6% 0.046 138.1)
-
Step 300
300
#A7CD9B
oklch(80.8% 0.08 138.3)
-
Step 400
400
#77B363
oklch(70.6% 0.127 138.2)
-
Step 500
500
#51A032
oklch(63.2% 0.165 138.2)
-
Step 600
600 (this color)
#378F00
oklch(57.3% 0.178 138.3)
-
Step 700
700
#2B7300
oklch(49% 0.152 138.2)
-
Step 800
800
#225F00
oklch(42.8% 0.133 138.3)
-
Step 900
900
#204E0C
oklch(37.7% 0.107 138.3)
-
Step 950
950
#142E0A
oklch(27.1% 0.068 138.2)
#378F00 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) | #948100 | 0.118 |
| Deuteranopia (no green cones) | #897A1C | 0.115 |
| Tritanopia (no blue cones) | #2E8A79 | 0.124 |
| Achromatopsia (no color) | #7D7D7D | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378F00
#378F00
oklch(57.3% 0.178 138.3)
- #A34EBB
#A34EBB
oklch(57.4% 0.179 318.3)
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 #378F00, closest first.
No curated palette has a color within ΔE 0.04 of #378F00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.021
- True Green #089404 ΔE 0.022
- Forest Green #228B22 ΔE 0.023
- Irish Green #019529 ΔE 0.024
- Kelley Green #009337 ΔE 0.030
- Grass Green #3F9B0B ΔE 0.037
- Sap Green #5C8B15 ΔE 0.038
- Grassy Green #419C03 ΔE 0.040
Use #378F00 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.