#178B36
Closest named color: Forest Green (#228B22). oklch(55.8% 0.157 147), rgb(23, 139, 54).
Aa
Black text reads best on this color (4.78:1).
About this color
#178B36 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.157 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.017 away. Black text reads best on it, at 4.78:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.157) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.78:1 |
| White text | 4.39:1 |
Values
| HEX | #178B36 |
| RGB | rgb(23, 139, 54) |
| HSL | hsl(136, 72%, 32%) |
| OKLCH | oklch(55.8% 0.157 147) |
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 #178B36 | 4.39:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #178B36 | 4.78:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #178B36 text on white | 4.39:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #178B36 text on black | 4.78:1 | AA | Lc -31.8 | 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
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E1EEE2
oklch(93.6% 0.021 147.6)
-
Step 200
200
#C9E1CA
oklch(88.6% 0.04 146.4)
-
Step 300
300
#A3CEA6
oklch(81% 0.072 146.7)
-
Step 400
400
#6EB476
oklch(70.7% 0.114 146.9)
-
Step 500
500
#42A052
oklch(63% 0.145 147)
-
Step 600
600 (this color)
#178B36
oklch(55.8% 0.157 147)
-
Step 700
700
#007528
oklch(49% 0.145 147.1)
-
Step 800
800
#0B6022
oklch(42.8% 0.122 146.9)
-
Step 900
900
#164E21
oklch(37.6% 0.094 147)
-
Step 950
950
#0F2E14
oklch(27% 0.06 146.9)
#178B36 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) | #8D7E2D | 0.122 |
| Deuteranopia (no green cones) | #80753D | 0.121 |
| Tritanopia (no blue cones) | #008879 | 0.094 |
| Achromatopsia (no color) | #787878 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178B36
#178B36
oklch(55.8% 0.157 147)
- #A24DA3
#A24DA3
oklch(55.8% 0.157 327)
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 #178B36, closest first.
No curated palette has a color within ΔE 0.04 of #178B36.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.017
- Kelley Green #009337 ΔE 0.024
- Emerald Green #028F1E ΔE 0.027
- Irish Green #019529 ΔE 0.035
- Jungle Green #048243 ΔE 0.036
- Dark Grass Green #388004 ΔE 0.037
- Tree Green #2A7E19 ΔE 0.039
- Sea Green #2E8B57 ΔE 0.044
Use #178B36 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.