#42B757
Closest named color: Cool Green (#33B864). oklch(69.2% 0.171 146.7), rgb(66, 183, 87).
Aa
Black text reads best on this color (8.14:1).
About this color
#42B757 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.171 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.014 away. Black text reads best on it, at 8.14:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.14:1 |
| White text | 2.57:1 |
Values
| HEX | #42B757 |
| RGB | rgb(66, 183, 87) |
| HSL | hsl(131, 47%, 49%) |
| OKLCH | oklch(69.2% 0.171 146.7) |
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 #42B757 | 2.57:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #42B757 | 8.14:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #42B757 text on white | 2.57:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #42B757 text on black | 8.14:1 | AAA | Lc -51.9 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DDF0DE
oklch(93.6% 0.031 146.8)
-
Step 200
200
#C0E4C3
oklch(88.4% 0.059 147.3)
-
Step 300
300
#92D498
oklch(81% 0.107 146.7)
-
Step 400
400 (this color)
#42B757
oklch(69.2% 0.171 146.7)
-
Step 500
500
#00A63A
oklch(63.2% 0.189 146.7)
-
Step 600
600
#008C2F
oklch(55.7% 0.167 146.6)
-
Step 700
700
#007526
oklch(49% 0.147 146.7)
-
Step 800
800
#00601E
oklch(42.6% 0.127 146.7)
-
Step 900
900
#005018
oklch(37.6% 0.112 146.9)
-
Step 950
950
#00300B
oklch(26.9% 0.08 146.8)
#42B757 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) | #B9A74F | 0.133 |
| Deuteranopia (no green cones) | #AB9D5E | 0.133 |
| Tritanopia (no blue cones) | #21B3A1 | 0.101 |
| Achromatopsia (no color) | #A1A1A1 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42B757
#42B757
oklch(69.2% 0.171 146.7)
- #D171D3
#D171D3
oklch(69.1% 0.171 326.5)
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 #42B757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.014
- Leafy Green #51B73B ΔE 0.026
- Dark Pastel Green #56AE57 ΔE 0.028
- Shamrock #01B44C ΔE 0.029
- Medium Green #39AD48 ΔE 0.031
- Dark Mint Green #20C073 ΔE 0.034
- Boring Green #63B365 ΔE 0.035
- Algae Green #21C36F ΔE 0.036
Use #42B757 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.