#178C05
Closest named color: Emerald Green (#028F1E). oklch(55.7% 0.184 141.7), rgb(23, 140, 5).
Aa
Black text reads best on this color (4.78:1).
About this color
#178C05 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.184 and its hue 142°. 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 4.78:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.184) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #178C05 |
| RGB | rgb(23, 140, 5) |
| HSL | hsl(112, 93%, 28%) |
| OKLCH | oklch(55.7% 0.184 141.7) |
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 #178C05 | 4.38:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #178C05 | 4.78:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #178C05 text on white | 4.38:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #178C05 text on black | 4.78:1 | AA | Lc -31.9 | 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
#E1EEDF
oklch(93.5% 0.024 141.5)
-
Step 200
200
#C9E1C5
oklch(88.4% 0.046 141.2)
-
Step 300
300
#A3CF9D
oklch(81% 0.083 141.7)
-
Step 400
400
#6EB566
oklch(70.7% 0.132 141.8)
-
Step 500
500
#42A238
oklch(63.2% 0.17 141.8)
-
Step 600
600 (this color)
#178C05
oklch(55.7% 0.184 141.7)
-
Step 700
700
#0F7600
oklch(49.2% 0.164 141.7)
-
Step 800
800
#0C6001
oklch(42.6% 0.141 141.7)
-
Step 900
900
#164F10
oklch(37.7% 0.11 141.8)
-
Step 950
950
#0F2E0C
oklch(26.8% 0.069 141.9)
#178C05 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) | #907E00 | 0.130 |
| Deuteranopia (no green cones) | #83751D | 0.127 |
| Tritanopia (no blue cones) | #008776 | 0.122 |
| Achromatopsia (no color) | #787878 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178C05
#178C05
oklch(55.7% 0.184 141.7)
- #A345B2
#A345B2
oklch(55.8% 0.184 321.9)
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 #178C05, closest first.
No curated palette has a color within ΔE 0.04 of #178C05.
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 0.016
- True Green #089404 ΔE 0.024
- Irish Green #019529 ΔE 0.028
- Kelley Green #009337 ΔE 0.031
- Dark Grass Green #388004 ΔE 0.037
- Green #008000 ΔE 0.038
- Tree Green #2A7E19 ΔE 0.045
Use #178C05 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.