#66CA78
Closest named color: Soft Green (#6FC276). oklch(75.8% 0.15 147.9), rgb(102, 202, 120).
Aa
Black text reads best on this color (10.28:1).
About this color
#66CA78 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.150 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.022 away. Black text reads best on it, at 10.28:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 10.28:1 |
| White text | 2.04:1 |
Values
| HEX | #66CA78 |
| RGB | rgb(102, 202, 120) |
| HSL | hsl(131, 49%, 60%) |
| OKLCH | oklch(75.8% 0.15 147.9) |
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 #66CA78 | 2.04:1 | Fails | Lc -44.0 | Non-text elements, placeholder text |
| Black text on #66CA78 | 10.28:1 | AAA | Lc 64.4 | Content text, not long reading |
| #66CA78 text on white | 2.04:1 | Fails | Lc 39.5 | Non-text elements, placeholder text |
| #66CA78 text on black | 10.28:1 | AAA | Lc -62.8 | 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
#EDF9EE
oklch(97% 0.019 147.9)
-
Step 100
100
#D7F2DA
oklch(93.5% 0.043 148.4)
-
Step 200
200
#B4E9BA
oklch(88.5% 0.084 147.8)
-
Step 300
300 (this color)
#66CA78
oklch(75.8% 0.15 147.9)
-
Step 400
400
#00C14D
oklch(70.7% 0.205 147.9)
-
Step 500
500
#00A641
oklch(63.2% 0.184 147.9)
-
Step 600
600
#008B35
oklch(55.5% 0.161 147.8)
-
Step 700
700
#00752C
oklch(49% 0.142 148)
-
Step 800
800
#006022
oklch(42.6% 0.124 147.8)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#00300D
oklch(27% 0.078 147.8)
#66CA78 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) | #CCBB72 | 0.121 |
| Deuteranopia (no green cones) | #BEB27D | 0.119 |
| Tritanopia (no blue cones) | #54C6B6 | 0.087 |
| Achromatopsia (no color) | #B5B5B5 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CA78
#66CA78
oklch(75.8% 0.15 147.9)
- #E38CE0
#E38CE0
oklch(75.8% 0.15 328.1)
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 #66CA78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.022
- Dark Mint #48C072 ΔE 0.039
- Seaweed #18D17B ΔE 0.039
- Algae Green #21C36F ΔE 0.048
- Greenblue #23C48B ΔE 0.049
- Dark Mint Green #20C073 ΔE 0.053
- Turtle Green #75B84F ΔE 0.055
- Emerald #06D6A0 ΔE 0.055
Use #66CA78 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.