#42E379
Closest named color: Weird Green (#3AE57F). oklch(81% 0.197 150.3), rgb(66, 227, 121).
Aa
Black text reads best on this color (12.49:1).
About this color
#42E379 is a light, vivid green. In OKLCH its lightness is 81%, its chroma 0.197 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Weird Green (#3AE57F), ΔE 0.007 away. Black text reads best on it, at 12.49:1.
| Hue family | Greens |
| Lightness | light (81%) |
| Chroma | vivid (0.197) |
| Temperature | in between |
| Nearest name | Weird Green (#3AE57F) |
| Black text | 12.49:1 |
| White text | 1.68:1 |
Values
| HEX | #42E379 |
| RGB | rgb(66, 227, 121) |
| HSL | hsl(140, 74%, 57%) |
| OKLCH | oklch(81% 0.197 150.3) |
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 #42E379 | 1.68:1 | Fails | Lc -33.0 | Non-text elements, placeholder text |
| Black text on #42E379 | 12.49:1 | AAA | Lc 74.5 | Content text, not long reading |
| #42E379 text on white | 1.68:1 | Fails | Lc 29.3 | Dividers and decoration only |
| #42E379 text on black | 12.49:1 | AAA | Lc -73.6 | Content text, not long reading |
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 300.
-
Step 50
50
#EAFBEC
oklch(97.1% 0.027 148.8)
-
Step 100
100
#D0F5D6
oklch(93.5% 0.057 149.8)
-
Step 200
200
#A3EEB3
oklch(88.5% 0.11 150.3)
-
Step 300
300 (this color)
#42E379
oklch(81% 0.197 150.3)
-
Step 400
400
#00C05B
oklch(70.6% 0.193 150.4)
-
Step 500
500
#00A54D
oklch(63.1% 0.172 150.4)
-
Step 600
600
#008B40
oklch(55.7% 0.152 150.4)
-
Step 700
700
#007534
oklch(49.2% 0.135 150.2)
-
Step 800
800
#00602A
oklch(42.8% 0.117 150.4)
-
Step 900
900
#005022
oklch(37.7% 0.103 150.5)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#42E379 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) | #E4D071 | 0.163 |
| Deuteranopia (no green cones) | #D1C280 | 0.161 |
| Tritanopia (no blue cones) | #00DFCA | 0.109 |
| Achromatopsia (no color) | #C8C8C8 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E379
#42E379
oklch(81% 0.197 150.3)
- #FF94F5
#FF94F5
oklch(81% 0.174 330.5)
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 #42E379, closest first.
No curated palette has a color within ΔE 0.04 of #42E379.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Weird Green #3AE57F ΔE 0.007
- Aqua Green #12E193 ΔE 0.034
- Fresh Green #69D84F ΔE 0.042
- Turquoise Green #04F489 ΔE 0.044
- Minty Green #0BF77D ΔE 0.054
- Seaweed #18D17B ΔE 0.056
- Wintergreen #20F986 ΔE 0.058
- Toxic Green #61DE2A ΔE 0.059
Use #42E379 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.