#278F17
Closest named color: Emerald Green (#028F1E). oklch(57% 0.177 141.4), rgb(39, 143, 23).
Aa
Black text reads best on this color (5.02:1).
About this color
#278F17 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.177 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.011 away. Black text reads best on it, at 5.02:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #278F17 |
| RGB | rgb(39, 143, 23) |
| HSL | hsl(112, 72%, 33%) |
| OKLCH | oklch(57% 0.177 141.4) |
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 #278F17 | 4.17:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #278F17 | 5.02:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #278F17 text on white | 4.17:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #278F17 text on black | 5.02:1 | AA | Lc -33.4 | 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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE0
oklch(93.6% 0.023 141.2)
-
Step 200
200
#CAE1C6
oklch(88.5% 0.044 141)
-
Step 300
300
#A4CE9E
oklch(80.9% 0.08 141.5)
-
Step 400
400
#71B468
oklch(70.6% 0.127 141.5)
-
Step 500
500
#47A13B
oklch(63.2% 0.164 141.4)
-
Step 600
600 (this color)
#278F17
oklch(57% 0.177 141.4)
-
Step 700
700
#137500
oklch(49% 0.163 141.4)
-
Step 800
800
#146007
oklch(42.7% 0.137 141.4)
-
Step 900
900
#1A4F12
oklch(37.8% 0.107 141.2)
-
Step 950
950
#112E0D
oklch(27% 0.067 141.3)
#278F17 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) | #938100 | 0.123 |
| Deuteranopia (no green cones) | #877927 | 0.122 |
| Tritanopia (no blue cones) | #098A79 | 0.117 |
| Achromatopsia (no color) | #7C7C7C | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278F17
#278F17
oklch(57% 0.177 141.4)
- #A54BB5
#A54BB5
oklch(56.9% 0.179 321.4)
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 #278F17, closest first.
No curated palette has a color within ΔE 0.04 of #278F17.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.011
- Forest Green #228B22 ΔE 0.015
- Irish Green #019529 ΔE 0.018
- True Green #089404 ΔE 0.020
- Kelley Green #009337 ΔE 0.022
- Grass Green #3F9B0B ΔE 0.042
- Dark Grass Green #388004 ΔE 0.043
- Sap Green #5C8B15 ΔE 0.044
Use #278F17 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.