#40AC23
Closest named color: Leaf Green (#5CA904). oklch(65.7% 0.196 140.1), rgb(64, 172, 35).
Aa
Black text reads best on this color (7.14:1).
About this color
#40AC23 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.196 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.021 away. Black text reads best on it, at 7.14:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.196) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 7.14:1 |
| White text | 2.93:1 |
Values
| HEX | #40AC23 |
| RGB | rgb(64, 172, 35) |
| HSL | hsl(107, 66%, 41%) |
| OKLCH | oklch(65.7% 0.196 140.1) |
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 #40AC23 | 2.93:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #40AC23 | 7.14:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #40AC23 text on white | 2.93:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #40AC23 text on black | 7.14:1 | AAA | Lc -46.4 | 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 500.
-
Step 50
50
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDD
oklch(93.6% 0.029 140.5)
-
Step 200
200
#C7E2C1
oklch(88.4% 0.053 140)
-
Step 300
300
#A0D095
oklch(80.9% 0.095 139.8)
-
Step 400
400
#68B757
oklch(70.6% 0.153 140.1)
-
Step 500
500 (this color)
#40AC23
oklch(65.7% 0.196 140.1)
-
Step 600
600
#278B00
oklch(55.7% 0.18 140.1)
-
Step 700
700
#1F7500
oklch(49.2% 0.159 140.2)
-
Step 800
800
#186000
oklch(42.8% 0.138 140.2)
-
Step 900
900
#125000
oklch(37.7% 0.122 140.2)
-
Step 950
950
#0B2F04
oklch(26.9% 0.08 140.4)
#40AC23 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) | #B19C00 | 0.131 |
| Deuteranopia (no green cones) | #A49333 | 0.132 |
| Tritanopia (no blue cones) | #30A693 | 0.132 |
| Achromatopsia (no color) | #969696 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AC23
#40AC23
oklch(65.7% 0.196 140.1)
- #C461DA
#C461DA
oklch(65.7% 0.196 320)
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 #40AC23, closest first.
No curated palette has a color within ΔE 0.04 of #40AC23.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.021
- Kelly Green #02AB2E ΔE 0.022
- Grass #5CAC2D ΔE 0.025
- Medium Green #39AD48 ΔE 0.027
- Shamrock #01B44C ΔE 0.033
- Leafy Green #51B73B ΔE 0.038
- Mid Green #50A747 ΔE 0.038
- Grassy Green #419C03 ΔE 0.045
Use #40AC23 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.