#178828
Closest named color: Forest Green (#228B22). oklch(54.8% 0.164 144.7), rgb(23, 136, 40).
Aa
Black text reads best on this color (4.58:1).
About this color
#178828 is a medium-dark, vivid green. In OKLCH its lightness is 55%, its chroma 0.164 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.012 away. Black text reads best on it, at 4.58:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #178828 |
| RGB | rgb(23, 136, 40) |
| HSL | hsl(129, 71%, 31%) |
| OKLCH | oklch(54.8% 0.164 144.7) |
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 #178828 | 4.57:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #178828 | 4.58:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #178828 text on white | 4.57:1 | AA | Lc 71.2 | Content text, not long reading |
| #178828 text on black | 4.58:1 | AA | Lc -30.4 | 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
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#C9E1C9
oklch(88.5% 0.041 145.2)
-
Step 300
300
#A4CEA3
oklch(81% 0.074 144.3)
-
Step 400
400
#70B471
oklch(70.7% 0.118 144.5)
-
Step 500
500
#44A04A
oklch(63% 0.151 144.7)
-
Step 600
600 (this color)
#178828
oklch(54.8% 0.164 144.7)
-
Step 700
700
#07751D
oklch(49% 0.152 144.7)
-
Step 800
800
#0F601B
oklch(42.8% 0.127 144.8)
-
Step 900
900
#184E1C
oklch(37.6% 0.098 144.5)
-
Step 950
950
#102E12
oklch(27% 0.062 144.9)
#178828 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) | #8A7B1A | 0.120 |
| Deuteranopia (no green cones) | #7E7231 | 0.121 |
| Tritanopia (no blue cones) | #008475 | 0.103 |
| Achromatopsia (no color) | #757575 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178828
#178828
oklch(54.8% 0.164 144.7)
- #9E48A5
#9E48A5
oklch(54.7% 0.164 324.6)
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 #178828, closest first.
No curated palette has a color within ΔE 0.04 of #178828.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.012
- Emerald Green #028F1E ΔE 0.024
- Dark Grass Green #388004 ΔE 0.027
- Tree Green #2A7E19 ΔE 0.029
- Green #008000 ΔE 0.031
- Kelley Green #009337 ΔE 0.032
- Jungle Green #048243 ΔE 0.038
- Irish Green #019529 ΔE 0.039
Use #178828 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.