#42B037
Closest named color: Medium Green (#39AD48). oklch(66.9% 0.188 141.8), rgb(66, 176, 55).
Aa
Black text reads best on this color (7.49:1).
About this color
#42B037 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.188 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.019 away. Black text reads best on it, at 7.49:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.188) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 7.49:1 |
| White text | 2.80:1 |
Values
| HEX | #42B037 |
| RGB | rgb(66, 176, 55) |
| HSL | hsl(115, 52%, 45%) |
| OKLCH | oklch(66.9% 0.188 141.8) |
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 #42B037 | 2.80:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #42B037 | 7.49:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #42B037 text on white | 2.80:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #42B037 text on black | 7.49:1 | AAA | Lc -48.4 | 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
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DEF0DB
oklch(93.6% 0.034 141.2)
-
Step 200
200
#C2E5BD
oklch(88.6% 0.065 141.6)
-
Step 300
300
#94D48D
oklch(80.9% 0.117 142.1)
-
Step 400
400 (this color)
#42B037
oklch(66.9% 0.188 141.8)
-
Step 500
500
#17A600
oklch(63% 0.211 141.8)
-
Step 600
600
#128C00
oklch(55.6% 0.186 141.8)
-
Step 700
700
#0D7600
oklch(49.2% 0.165 141.8)
-
Step 800
800
#096100
oklch(42.8% 0.143 141.8)
-
Step 900
900
#065100
oklch(37.8% 0.127 141.8)
-
Step 950
950
#023000
oklch(26.9% 0.09 141.9)
#42B037 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) | #B4A026 | 0.131 |
| Deuteranopia (no green cones) | #A79742 | 0.132 |
| Tritanopia (no blue cones) | #2FAB98 | 0.123 |
| Achromatopsia (no color) | #9A9A9A | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42B037
#42B037
oklch(66.9% 0.188 141.8)
- #C867D8
#C867D8
oklch(66.9% 0.187 321.8)
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 #42B037, closest first.
No curated palette has a color within ΔE 0.04 of #42B037.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.019
- Grass #5CAC2D ΔE 0.020
- Shamrock #01B44C ΔE 0.023
- Leafy Green #51B73B ΔE 0.024
- Leaf Green #5CA904 ΔE 0.027
- Kelly Green #02AB2E ΔE 0.031
- Mid Green #50A747 ΔE 0.035
- Dark Pastel Green #56AE57 ΔE 0.039
Use #42B037 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.