#18B33B
Closest named color: Shamrock (#01B44C). oklch(66.9% 0.2 145.6), rgb(24, 179, 59).
Aa
Black text reads best on this color (7.55:1).
About this color
#18B33B is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.200 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.014 away. Black text reads best on it, at 7.55:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.55:1 |
| White text | 2.78:1 |
Values
| HEX | #18B33B |
| RGB | rgb(24, 179, 59) |
| HSL | hsl(134, 76%, 40%) |
| OKLCH | oklch(66.9% 0.2 145.6) |
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 #18B33B | 2.78:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #18B33B | 7.55:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #18B33B text on white | 2.78:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #18B33B text on black | 7.55:1 | AAA | Lc -48.9 | 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
#BDE6BE
oklch(88.5% 0.069 145.6)
-
Step 300
300
#8AD68E
oklch(80.8% 0.125 145.5)
-
Step 400
400 (this color)
#18B33B
oklch(66.9% 0.2 145.6)
-
Step 500
500
#00A631
oklch(63.1% 0.195 145.5)
-
Step 600
600
#008C28
oklch(55.7% 0.172 145.6)
-
Step 700
700
#007620
oklch(49.2% 0.152 145.5)
-
Step 800
800
#006119
oklch(42.8% 0.133 145.6)
-
Step 900
900
#005113
oklch(37.8% 0.117 145.5)
-
Step 950
950
#003008
oklch(26.9% 0.083 145.6)
#18B33B 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) | #B6A22B | 0.150 |
| Deuteranopia (no green cones) | #A69746 | 0.150 |
| Tritanopia (no blue cones) | #00AE9A | 0.123 |
| Achromatopsia (no color) | #9B9B9B | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B33B
#18B33B
oklch(66.9% 0.2 145.6)
- #D060D6
#D060D6
oklch(66.9% 0.2 325.5)
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 #18B33B, closest first.
No curated palette has a color within ΔE 0.04 of #18B33B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.014
- Kelly Green #02AB2E ΔE 0.025
- Medium Green #39AD48 ΔE 0.027
- Leafy Green #51B73B ΔE 0.033
- Grass #5CAC2D ΔE 0.038
- Shamrock Green #02C14D ΔE 0.039
- Leaf Green #5CA904 ΔE 0.041
- Cool Green #33B864 ΔE 0.045
Use #18B33B 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.