#188D63
Closest named color: Viridian (#1E9167). oklch(57.2% 0.118 162.6), rgb(24, 141, 99).
Aa
Black text reads best on this color (5.02:1).
About this color
#188D63 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.118 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.013 away. Black text reads best on it, at 5.02:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #188D63 |
| RGB | rgb(24, 141, 99) |
| HSL | hsl(158, 71%, 32%) |
| OKLCH | oklch(57.2% 0.118 162.6) |
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 #188D63 | 4.17:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #188D63 | 5.02:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #188D63 text on white | 4.17:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #188D63 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
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E1EDE7
oklch(93.5% 0.015 164.7)
-
Step 200
200
#C9E0D3
oklch(88.6% 0.03 161)
-
Step 300
300
#A2CCB7
oklch(80.9% 0.053 163.3)
-
Step 400
400
#6DB191
oklch(70.6% 0.084 162.9)
-
Step 500
500
#3F9E76
oklch(63.2% 0.109 162.6)
-
Step 600
600 (this color)
#188D63
oklch(57.2% 0.118 162.6)
-
Step 700
700
#00734E
oklch(49.1% 0.107 162.4)
-
Step 800
800
#055E40
oklch(42.7% 0.091 162.7)
-
Step 900
900
#144D36
oklch(37.7% 0.071 162.4)
-
Step 950
950
#0E2D20
oklch(26.9% 0.044 163.2)
#188D63 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) | #8B8261 | 0.115 |
| Deuteranopia (no green cones) | #7D7866 | 0.111 |
| Tritanopia (no blue cones) | #008D82 | 0.046 |
| Achromatopsia (no color) | #7C7C7C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #188D63
#188D63
oklch(57.2% 0.118 162.6)
- #A75A8B
#A75A8B
oklch(57.3% 0.118 342.6)
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 #188D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.013
- Sea Green #2E8B57 ΔE 0.016
- Light Forest Green #4F9153 ΔE 0.043
- Ocean Green #3D9973 ΔE 0.047
- Dark Sage #598556 ΔE 0.047
- Jungle Green #048243 ΔE 0.049
- Fern Green #548D44 ΔE 0.051
- Dark Cyan #008B8B ΔE 0.063
Use #188D63 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.