#66BD63
Closest named color: Turtle Green (#75B84F). oklch(72.2% 0.151 143.2), rgb(102, 189, 99).
Aa
Black text reads best on this color (9.02:1).
About this color
#66BD63 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.151 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.022 away. Black text reads best on it, at 9.02:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.02:1 |
| White text | 2.32:1 |
Values
| HEX | #66BD63 |
| RGB | rgb(102, 189, 99) |
| HSL | hsl(118, 41%, 56%) |
| OKLCH | oklch(72.2% 0.151 143.2) |
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 #66BD63 | 2.32:1 | Fails | Lc -50.6 | Large or bold text, headings |
| Black text on #66BD63 | 9.02:1 | AAA | Lc 58.3 | Large or bold text, headings |
| #66BD63 text on white | 2.32:1 | Fails | Lc 45.7 | Large or bold text, headings |
| #66BD63 text on black | 9.02:1 | AAA | Lc -56.4 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDE
oklch(93.6% 0.028 142)
-
Step 200
200
#C5E3C3
oklch(88.5% 0.054 143.4)
-
Step 300
300
#9CD199
oklch(80.9% 0.095 143.3)
-
Step 400
400 (this color)
#66BD63
oklch(72.2% 0.151 143.2)
-
Step 500
500
#25A529
oklch(63.1% 0.193 143.2)
-
Step 600
600
#008C0F
oklch(55.5% 0.185 143.2)
-
Step 700
700
#00760B
oklch(49.1% 0.163 143.2)
-
Step 800
800
#006107
oklch(42.7% 0.142 143.1)
-
Step 900
900
#005105
oklch(37.7% 0.126 143.2)
-
Step 950
950
#073007
oklch(27.1% 0.081 143)
#66BD63 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) | #C1AF5C | 0.113 |
| Deuteranopia (no green cones) | #B4A769 | 0.110 |
| Tritanopia (no blue cones) | #5BB8A8 | 0.097 |
| Achromatopsia (no color) | #AAAAAA | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BD63
#66BD63
oklch(72.2% 0.151 143.2)
- #D282DC
#D282DC
oklch(72.2% 0.152 322.9)
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 #66BD63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.022
- Dark Mint #48C072 ΔE 0.024
- Soft Green #6FC276 ΔE 0.027
- Boring Green #63B365 ΔE 0.030
- Algae Green #21C36F ΔE 0.038
- Dark Mint Green #20C073 ΔE 0.039
- Cool Green #33B864 ΔE 0.040
- Leafy Green #51B73B ΔE 0.047
Use #66BD63 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.