#178E30
Closest named color: Forest Green (#228B22). oklch(56.6% 0.166 145.7), rgb(23, 142, 48).
Aa
Black text reads best on this color (4.94:1).
About this color
#178E30 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.166 and its hue 146°. 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 4.94:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #178E30 |
| RGB | rgb(23, 142, 48) |
| HSL | hsl(133, 72%, 32%) |
| OKLCH | oklch(56.6% 0.166 145.7) |
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 #178E30 | 4.24:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #178E30 | 4.94:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #178E30 text on white | 4.24:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #178E30 text on black | 4.94:1 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E1EEE1
oklch(93.6% 0.022 145.4)
-
Step 200
200
#C9E1C9
oklch(88.5% 0.041 145.2)
-
Step 300
300
#A2CEA4
oklch(80.9% 0.075 146)
-
Step 400
400
#6DB472
oklch(70.6% 0.119 145.8)
-
Step 500
500
#40A14C
oklch(63.1% 0.152 145.7)
-
Step 600
600 (this color)
#178E30
oklch(56.6% 0.166 145.7)
-
Step 700
700
#007621
oklch(49.2% 0.152 145.7)
-
Step 800
800
#08601C
oklch(42.7% 0.127 145.6)
-
Step 900
900
#154F1D
oklch(37.8% 0.1 145.5)
-
Step 950
950
#0E2E12
oklch(26.9% 0.063 145.9)
#178E30 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) | #908024 | 0.125 |
| Deuteranopia (no green cones) | #847738 | 0.125 |
| Tritanopia (no blue cones) | #008A7A | 0.101 |
| Achromatopsia (no color) | #7B7B7B | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178E30
#178E30
oklch(56.6% 0.166 145.7)
- #A54DAA
#A54DAA
oklch(56.6% 0.165 325.4)
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 #178E30, closest first.
No curated palette has a color within ΔE 0.04 of #178E30.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.012
- Kelley Green #009337 ΔE 0.014
- Emerald Green #028F1E ΔE 0.016
- Irish Green #019529 ΔE 0.023
- True Green #089404 ΔE 0.033
- Dark Grass Green #388004 ΔE 0.042
- Tree Green #2A7E19 ΔE 0.046
- Jungle Green #048243 ΔE 0.048
Use #178E30 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.