#18B248
Closest named color: Shamrock (#01B44C). oklch(66.8% 0.189 147.5), rgb(24, 178, 72).
Aa
Black text reads best on this color (7.50:1).
About this color
#18B248 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.189 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.006 away. Black text reads best on it, at 7.50:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.189) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.50:1 |
| White text | 2.79:1 |
Values
| HEX | #18B248 |
| RGB | rgb(24, 178, 72) |
| HSL | hsl(139, 76%, 40%) |
| OKLCH | oklch(66.8% 0.189 147.5) |
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 #18B248 | 2.79:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #18B248 | 7.50:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #18B248 text on white | 2.79:1 | Fails | Lc 53.3 | Large or bold text, headings |
| #18B248 text on black | 7.50:1 | AAA | Lc -48.6 | 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 500.
-
Step 50
50
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE0
oklch(93.6% 0.026 147.1)
-
Step 200
200
#C3E3C6
oklch(88.5% 0.052 147.7)
-
Step 300
300
#98D19E
oklch(80.8% 0.092 147.4)
-
Step 400
400
#57B968
oklch(70.7% 0.149 147.5)
-
Step 500
500 (this color)
#18B248
oklch(66.8% 0.189 147.5)
-
Step 600
600
#008B33
oklch(55.5% 0.163 147.4)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501A
oklch(37.6% 0.11 147.5)
-
Step 950
950
#01300D
oklch(27% 0.078 147.4)
#18B248 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) | #B4A13D | 0.148 |
| Deuteranopia (no green cones) | #A49651 | 0.147 |
| Tritanopia (no blue cones) | #00AE9B | 0.112 |
| Achromatopsia (no color) | #9A9A9A | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B248
#18B248
oklch(66.8% 0.189 147.5)
- #CF63CF
#CF63CF
oklch(66.8% 0.189 327.4)
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 #18B248, closest first.
No curated palette has a color within ΔE 0.04 of #18B248.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.006
- Medium Green #39AD48 ΔE 0.018
- Kelly Green #02AB2E ΔE 0.028
- Leafy Green #51B73B ΔE 0.035
- Cool Green #33B864 ΔE 0.036
- Grass #5CAC2D ΔE 0.037
- Mid Green #50A747 ΔE 0.039
- Dark Pastel Green #56AE57 ΔE 0.042
Use #18B248 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.