#18B136
Closest named color: Shamrock (#01B44C). oklch(66.3% 0.201 145), rgb(24, 177, 54).
Aa
Black text reads best on this color (7.38:1).
About this color
#18B136 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.201 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.019 away. Black text reads best on it, at 7.38:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.201) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.38:1 |
| White text | 2.84:1 |
Values
| HEX | #18B136 |
| RGB | rgb(24, 177, 54) |
| HSL | hsl(132, 76%, 39%) |
| OKLCH | oklch(66.3% 0.201 145) |
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 #18B136 | 2.84:1 | Fails | Lc -59.2 | Large or bold text, headings |
| Black text on #18B136 | 7.38:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #18B136 text on white | 2.84:1 | Fails | Lc 53.9 | Large or bold text, headings |
| #18B136 text on black | 7.38:1 | AAA | Lc -47.9 | 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 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
#C3E3C3
oklch(88.4% 0.055 145.1)
-
Step 300
300
#98D299
oklch(80.9% 0.099 145)
-
Step 400
400
#58BA5F
oklch(70.8% 0.158 145)
-
Step 500
500 (this color)
#18B136
oklch(66.3% 0.201 145)
-
Step 600
600
#008C24
oklch(55.6% 0.175 145)
-
Step 700
700
#00761D
oklch(49.2% 0.154 145)
-
Step 800
800
#006116
oklch(42.8% 0.135 145)
-
Step 900
900
#005111
oklch(37.8% 0.119 145.1)
-
Step 950
950
#013008
oklch(26.9% 0.083 145.3)
#18B136 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) | #B4A024 | 0.149 |
| Deuteranopia (no green cones) | #A49542 | 0.149 |
| Tritanopia (no blue cones) | #00AC98 | 0.125 |
| Achromatopsia (no color) | #999999 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B136
#18B136
oklch(66.3% 0.201 145)
- #CE5ED5
#CE5ED5
oklch(66.3% 0.201 325.2)
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 #18B136, closest first.
No curated palette has a color within ΔE 0.04 of #18B136.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.019
- Kelly Green #02AB2E ΔE 0.019
- Medium Green #39AD48 ΔE 0.027
- Leafy Green #51B73B ΔE 0.037
- Grass #5CAC2D ΔE 0.037
- Leaf Green #5CA904 ΔE 0.039
- Shamrock Green #02C14D ΔE 0.045
- Mid Green #50A747 ΔE 0.046
Use #18B136 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.