#42C86C
Closest named color: Algae Green (#21C36F). oklch(73.9% 0.174 150), rgb(66, 200, 108).
Aa
Black text reads best on this color (9.70:1).
About this color
#42C86C is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.174 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.022 away. Black text reads best on it, at 9.70:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.70:1 |
| White text | 2.16:1 |
Values
| HEX | #42C86C |
| RGB | rgb(66, 200, 108) |
| HSL | hsl(139, 55%, 52%) |
| OKLCH | oklch(73.9% 0.174 150) |
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 #42C86C | 2.16:1 | Fails | Lc -46.8 | Large or bold text, headings |
| Black text on #42C86C | 9.70:1 | AAA | Lc 61.9 | Content text, not long reading |
| #42C86C text on white | 2.16:1 | Fails | Lc 42.1 | Non-text elements, placeholder text |
| #42C86C text on black | 9.70:1 | AAA | Lc -60.1 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C4
oklch(88.5% 0.061 149.4)
-
Step 300
300
#8CD59B
oklch(81% 0.11 149.9)
-
Step 400
400 (this color)
#42C86C
oklch(73.9% 0.174 150)
-
Step 500
500
#00A54B
oklch(63.1% 0.174 149.9)
-
Step 600
600
#008B3E
oklch(55.6% 0.154 149.9)
-
Step 700
700
#007533
oklch(49.1% 0.136 149.9)
-
Step 800
800
#006029
oklch(42.7% 0.118 150)
-
Step 900
900
#005021
oklch(37.7% 0.104 150)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#42C86C 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) | #C9B765 | 0.144 |
| Deuteranopia (no green cones) | #B9AC72 | 0.142 |
| Tritanopia (no blue cones) | #00C5B2 | 0.096 |
| Achromatopsia (no color) | #B0B0B0 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42C86C
#42C86C
oklch(73.9% 0.174 150)
- #E67DDE
#E67DDE
oklch(73.8% 0.175 330)
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 #42C86C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.022
- Seaweed #18D17B ΔE 0.026
- Dark Mint #48C072 ΔE 0.026
- Dark Mint Green #20C073 ΔE 0.031
- Soft Green #6FC276 ΔE 0.041
- Greenblue #23C48B ΔE 0.044
- Shamrock Green #02C14D ΔE 0.045
- Cool Green #33B864 ΔE 0.047
Use #42C86C 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.