#188F27
Closest named color: Emerald Green (#028F1E). oklch(56.8% 0.173 144.2), rgb(24, 143, 39).
Aa
Black text reads best on this color (4.99:1).
About this color
#188F27 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.173 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.009 away. Black text reads best on it, at 4.99:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #188F27 |
| RGB | rgb(24, 143, 39) |
| HSL | hsl(128, 71%, 33%) |
| OKLCH | oklch(56.8% 0.173 144.2) |
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 #188F27 | 4.20:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #188F27 | 4.99:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #188F27 text on white | 4.20:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #188F27 text on black | 4.99:1 | AA | Lc -33.3 | 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
#C9E1C8
oklch(88.5% 0.042 144.1)
-
Step 300
300
#A2CEA1
oklch(80.8% 0.078 144.3)
-
Step 400
400
#6DB56E
oklch(70.8% 0.125 144.4)
-
Step 500
500
#40A145
oklch(63% 0.159 144.3)
-
Step 600
600 (this color)
#188F27
oklch(56.8% 0.173 144.2)
-
Step 700
700
#007617
oklch(49.1% 0.158 144.3)
-
Step 800
800
#076015
oklch(42.6% 0.133 144.3)
-
Step 900
900
#154F19
oklch(37.7% 0.103 144.2)
-
Step 950
950
#0E2E10
oklch(26.9% 0.065 144.6)
#188F27 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) | #928116 | 0.127 |
| Deuteranopia (no green cones) | #857832 | 0.127 |
| Tritanopia (no blue cones) | #008B7A | 0.108 |
| Achromatopsia (no color) | #7C7C7C | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #188F27
#188F27
oklch(56.8% 0.173 144.2)
- #A64BAF
#A64BAF
oklch(56.7% 0.173 324)
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 #188F27, closest first.
No curated palette has a color within ΔE 0.04 of #188F27.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.009
- Forest Green #228B22 ΔE 0.011
- Kelley Green #009337 ΔE 0.015
- Irish Green #019529 ΔE 0.017
- True Green #089404 ΔE 0.025
- Dark Grass Green #388004 ΔE 0.043
- Grass Green #3F9B0B ΔE 0.048
- Sap Green #5C8B15 ΔE 0.048
Use #188F27 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.