#42B939
Closest named color: Leafy Green (#51B73B). oklch(69.3% 0.197 142.1), rgb(66, 185, 57).
Aa
Black text reads best on this color (8.23:1).
About this color
#42B939 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.197 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.012 away. Black text reads best on it, at 8.23:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.197) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.23:1 |
| White text | 2.55:1 |
Values
| HEX | #42B939 |
| RGB | rgb(66, 185, 57) |
| HSL | hsl(116, 53%, 47%) |
| OKLCH | oklch(69.3% 0.197 142.1) |
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 #42B939 | 2.55:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #42B939 | 8.23:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #42B939 text on white | 2.55:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #42B939 text on black | 8.23:1 | AAA | Lc -52.4 | 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 400.
-
Step 50
50
#EFF8EE
oklch(97% 0.016 142.6)
-
Step 100
100
#DDF0DB
oklch(93.5% 0.034 142.6)
-
Step 200
200
#C0E5BC
oklch(88.4% 0.068 142.4)
-
Step 300
300
#91D58A
oklch(80.9% 0.124 142.2)
-
Step 400
400 (this color)
#42B939
oklch(69.3% 0.197 142.1)
-
Step 500
500
#0FA700
oklch(63.2% 0.213 142.1)
-
Step 600
600
#0B8C00
oklch(55.6% 0.187 142.1)
-
Step 700
700
#087600
oklch(49.1% 0.166 142.1)
-
Step 800
800
#056100
oklch(42.8% 0.144 142.1)
-
Step 900
900
#035100
oklch(37.7% 0.127 142.2)
-
Step 950
950
#013000
oklch(26.8% 0.091 142.2)
#42B939 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) | #BDA826 | 0.138 |
| Deuteranopia (no green cones) | #AF9E45 | 0.140 |
| Tritanopia (no blue cones) | #2BB39F | 0.128 |
| Achromatopsia (no color) | #A2A2A2 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42B939
#42B939
oklch(69.3% 0.197 142.1)
- #D36BE3
#D36BE3
oklch(69.3% 0.197 322.1)
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 #42B939, closest first.
No curated palette has a color within ΔE 0.04 of #42B939.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.012
- Shamrock Green #02C14D ΔE 0.026
- Frog Green #58BC08 ΔE 0.027
- Shamrock #01B44C ΔE 0.031
- Grass #5CAC2D ΔE 0.037
- Medium Green #39AD48 ΔE 0.041
- Cool Green #33B864 ΔE 0.042
- Leaf Green #5CA904 ΔE 0.044
Use #42B939 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.