#42A804
Closest named color: Leaf Green (#5CA904). oklch(64.6% 0.2 138.4), rgb(66, 168, 4).
Aa
Black text reads best on this color (6.83:1).
About this color
#42A804 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.200 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.022 away. Black text reads best on it, at 6.83:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 6.83:1 |
| White text | 3.07:1 |
Values
| HEX | #42A804 |
| RGB | rgb(66, 168, 4) |
| HSL | hsl(97, 95%, 34%) |
| OKLCH | oklch(64.6% 0.2 138.4) |
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 #42A804 | 3.07:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #42A804 | 6.83:1 | AA | Lc 46.9 | Large or bold text, headings |
| #42A804 text on white | 3.07:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #42A804 text on black | 6.83:1 | AA | Lc -44.6 | Non-text elements, placeholder text |
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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E1EFDD
oklch(93.7% 0.028 138.7)
-
Step 200
200
#C8E2C0
oklch(88.5% 0.054 138.3)
-
Step 300
300
#A1D092
oklch(80.9% 0.098 138.3)
-
Step 400
400
#6BB751
oklch(70.7% 0.157 138.4)
-
Step 500
500 (this color)
#42A804
oklch(64.6% 0.2 138.4)
-
Step 600
600
#348900
oklch(55.6% 0.173 138.4)
-
Step 700
700
#2A7300
oklch(49% 0.153 138.4)
-
Step 800
800
#215F00
oklch(42.8% 0.134 138.5)
-
Step 900
900
#1A4F00
oklch(37.7% 0.118 138.5)
-
Step 950
950
#0D2F01
oklch(26.9% 0.082 138.6)
#42A804 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) | #AD9800 | 0.131 |
| Deuteranopia (no green cones) | #A19024 | 0.129 |
| Tritanopia (no blue cones) | #37A28E | 0.138 |
| Achromatopsia (no color) | #939393 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A804
#42A804
oklch(64.6% 0.2 138.4)
- #BF5DDA
#BF5DDA
oklch(64.6% 0.2 318.5)
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 #42A804, closest first.
No curated palette has a color within ΔE 0.04 of #42A804.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.022
- Kelly Green #02AB2E ΔE 0.023
- Grass #5CAC2D ΔE 0.033
- Grassy Green #419C03 ΔE 0.035
- Medium Green #39AD48 ΔE 0.037
- Grass Green #3F9B0B ΔE 0.039
- Mid Green #50A747 ΔE 0.044
- Shamrock #01B44C ΔE 0.045
Use #42A804 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.