#42C78D
Closest named color: Greenblue (#23C48B). oklch(74.3% 0.143 160.6), rgb(66, 199, 141).
Aa
Black text reads best on this color (9.78:1).
About this color
#42C78D is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.143 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.017 away. Black text reads best on it, at 9.78:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.78:1 |
| White text | 2.14:1 |
Values
| HEX | #42C78D |
| RGB | rgb(66, 199, 141) |
| HSL | hsl(154, 54%, 52%) |
| OKLCH | oklch(74.3% 0.143 160.6) |
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 #42C78D | 2.14:1 | Fails | Lc -46.4 | Large or bold text, headings |
| Black text on #42C78D | 9.78:1 | AAA | Lc 62.2 | Content text, not long reading |
| #42C78D text on white | 2.14:1 | Fails | Lc 41.8 | Non-text elements, placeholder text |
| #42C78D text on black | 9.78:1 | AAA | Lc -60.5 | 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 400.
-
Step 50
50
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DCF0E4
oklch(93.7% 0.026 159.6)
-
Step 200
200
#BEE4CE
oklch(88.6% 0.05 159.8)
-
Step 300
300
#8CD3AD
oklch(80.9% 0.09 160.1)
-
Step 400
400 (this color)
#42C78D
oklch(74.3% 0.143 160.6)
-
Step 500
500
#00A36C
oklch(63.2% 0.142 160.5)
-
Step 600
600
#00895A
oklch(55.6% 0.125 160.5)
-
Step 700
700
#00734B
oklch(49% 0.11 160.6)
-
Step 800
800
#005E3D
oklch(42.6% 0.095 160.9)
-
Step 900
900
#004F32
oklch(37.7% 0.085 160.4)
-
Step 950
950
#002F1C
oklch(26.9% 0.06 160.5)
#42C78D 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) | #C4B88A | 0.136 |
| Deuteranopia (no green cones) | #B3AC91 | 0.132 |
| Tritanopia (no blue cones) | #00C6B7 | 0.060 |
| Achromatopsia (no color) | #B1B1B1 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42C78D
#42C78D
oklch(74.3% 0.143 160.6)
- #E785C7
#E785C7
oklch(74.2% 0.144 340.5)
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 #42C78D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.017
- Green Blue #01C08D ΔE 0.030
- Dark Mint #48C072 ΔE 0.034
- Soft Green #6FC276 ΔE 0.036
- Dark Mint Green #20C073 ΔE 0.041
- Emerald #06D6A0 ΔE 0.041
- Algae Green #21C36F ΔE 0.043
- Seaweed #18D17B ΔE 0.045
Use #42C78D 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.