#18B442
Closest named color: Shamrock (#01B44C). oklch(67.3% 0.196 146.5), rgb(24, 180, 66).
Aa
Black text reads best on this color (7.64:1).
About this color
#18B442 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.196 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.009 away. Black text reads best on it, at 7.64:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.196) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.64:1 |
| White text | 2.74:1 |
Values
| HEX | #18B442 |
| RGB | rgb(24, 180, 66) |
| HSL | hsl(136, 76%, 40%) |
| OKLCH | oklch(67.3% 0.196 146.5) |
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 #18B442 | 2.74:1 | Fails | Lc -57.7 | Large or bold text, headings |
| Black text on #18B442 | 7.64:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #18B442 text on white | 2.74:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #18B442 text on black | 7.64:1 | AAA | Lc -49.4 | 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
#EFF9EF
oklch(97.2% 0.017 145.4)
-
Step 100
100
#DBF1DC
oklch(93.6% 0.036 146.5)
-
Step 200
200
#BDE6BF
oklch(88.5% 0.068 146.3)
-
Step 300
300
#8AD691
oklch(80.9% 0.122 146.5)
-
Step 400
400 (this color)
#18B442
oklch(67.3% 0.196 146.5)
-
Step 500
500
#00A638
oklch(63.1% 0.19 146.5)
-
Step 600
600
#008C2E
oklch(55.7% 0.168 146.5)
-
Step 700
700
#007525
oklch(49% 0.148 146.5)
-
Step 800
800
#00601D
oklch(42.6% 0.128 146.5)
-
Step 900
900
#005017
oklch(37.6% 0.113 146.6)
-
Step 950
950
#00300A
oklch(26.9% 0.081 146.4)
#18B442 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) | #B6A335 | 0.150 |
| Deuteranopia (no green cones) | #A6984C | 0.149 |
| Tritanopia (no blue cones) | #00B09C | 0.118 |
| Achromatopsia (no color) | #9C9C9C | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B442
#18B442
oklch(67.3% 0.196 146.5)
- #D162D5
#D162D5
oklch(67.2% 0.197 326.2)
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 #18B442, closest first.
No curated palette has a color within ΔE 0.04 of #18B442.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.009
- Medium Green #39AD48 ΔE 0.025
- Kelly Green #02AB2E ΔE 0.029
- Leafy Green #51B73B ΔE 0.031
- Shamrock Green #02C14D ΔE 0.036
- Grass #5CAC2D ΔE 0.038
- Cool Green #33B864 ΔE 0.039
- Leaf Green #5CA904 ΔE 0.044
Use #18B442 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.