#18B228
Closest named color: Kelly Green (#02AB2E). oklch(66.5% 0.211 143.6), rgb(24, 178, 40).
Aa
Black text reads best on this color (7.43:1).
About this color
#18B228 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.211 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelly Green (#02AB2E), ΔE 0.023 away. Black text reads best on it, at 7.43:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.211) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #18B228 |
| RGB | rgb(24, 178, 40) |
| HSL | hsl(126, 76%, 40%) |
| OKLCH | oklch(66.5% 0.211 143.6) |
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 #18B228 | 2.82:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #18B228 | 7.43:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #18B228 text on white | 2.82:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #18B228 text on black | 7.43:1 | AAA | Lc -48.3 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C3E4C2
oklch(88.6% 0.058 144.3)
-
Step 300
300
#98D296
oklch(80.8% 0.102 143.8)
-
Step 400
400
#58BA58
oklch(70.7% 0.165 143.6)
-
Step 500
500 (this color)
#18B228
oklch(66.5% 0.211 143.6)
-
Step 600
600
#008C16
oklch(55.5% 0.182 143.6)
-
Step 700
700
#007611
oklch(49.1% 0.161 143.6)
-
Step 800
800
#00610C
oklch(42.7% 0.14 143.6)
-
Step 900
900
#005108
oklch(37.7% 0.124 143.6)
-
Step 950
950
#013004
oklch(26.9% 0.086 143.7)
#18B228 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) | #B6A003 | 0.152 |
| Deuteranopia (no green cones) | #A69638 | 0.151 |
| Tritanopia (no blue cones) | #00AD98 | 0.134 |
| Achromatopsia (no color) | #9A9A9A | 0.212 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B228
#18B228
oklch(66.5% 0.211 143.6)
- #CF5CDB
#CF5CDB
oklch(66.5% 0.21 323.8)
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 #18B228, closest first.
No curated palette has a color within ΔE 0.04 of #18B228.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.023
- Shamrock #01B44C ΔE 0.027
- Medium Green #39AD48 ΔE 0.037
- Leafy Green #51B73B ΔE 0.039
- Leaf Green #5CA904 ΔE 0.040
- Grass #5CAC2D ΔE 0.041
- Shamrock Green #02C14D ΔE 0.045
- Frog Green #58BC08 ΔE 0.049
Use #18B228 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.