#18B859
Closest named color: Shamrock (#01B44C). oklch(68.6% 0.182 150.2), rgb(24, 184, 89).
Aa
Black text reads best on this color (8.03:1).
About this color
#18B859 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.182 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.017 away. Black text reads best on it, at 8.03:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 8.03:1 |
| White text | 2.61:1 |
Values
| HEX | #18B859 |
| RGB | rgb(24, 184, 89) |
| HSL | hsl(144, 77%, 41%) |
| OKLCH | oklch(68.6% 0.182 150.2) |
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 #18B859 | 2.61:1 | Fails | Lc -55.5 | Large or bold text, headings |
| Black text on #18B859 | 8.03:1 | AAA | Lc 53.7 | Large or bold text, headings |
| #18B859 text on white | 2.61:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #18B859 text on black | 8.03:1 | AAA | Lc -51.6 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF9F0
oklch(97.2% 0.016 148.4)
-
Step 100
100
#DBF1DF
oklch(93.7% 0.033 150.8)
-
Step 200
200
#BCE6C4
oklch(88.6% 0.064 150.6)
-
Step 300
300
#89D69A
oklch(81% 0.114 150.2)
-
Step 400
400 (this color)
#18B859
oklch(68.6% 0.182 150.2)
-
Step 500
500
#00A54C
oklch(63.1% 0.173 150.1)
-
Step 600
600
#008B3F
oklch(55.7% 0.153 150.2)
-
Step 700
700
#007534
oklch(49.2% 0.135 150.2)
-
Step 800
800
#006029
oklch(42.7% 0.118 150)
-
Step 900
900
#005021
oklch(37.7% 0.104 150)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#18B859 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) | #B9A751 | 0.150 |
| Deuteranopia (no green cones) | #A89B60 | 0.149 |
| Tritanopia (no blue cones) | #00B5A2 | 0.101 |
| Achromatopsia (no color) | #A0A0A0 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B859
#18B859
oklch(68.6% 0.182 150.2)
- #D76ACE
#D76ACE
oklch(68.7% 0.182 330.5)
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 #18B859, closest first.
No curated palette has a color within ΔE 0.04 of #18B859.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.017
- Cool Green #33B864 ΔE 0.018
- Medium Green #39AD48 ΔE 0.031
- Shamrock Green #02C14D ΔE 0.032
- Leafy Green #51B73B ΔE 0.033
- Dark Mint Green #20C073 ΔE 0.034
- Algae Green #21C36F ΔE 0.036
- Jade Green #2BAF6A ΔE 0.039
Use #18B859 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.