#66BB52
Closest named color: Turtle Green (#75B84F). oklch(71.5% 0.164 139.9), rgb(102, 187, 82).
Aa
Black text reads best on this color (8.79:1).
About this color
#66BB52 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.164 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.015 away. Black text reads best on it, at 8.79:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 8.79:1 |
| White text | 2.38:1 |
Values
| HEX | #66BB52 |
| RGB | rgb(102, 187, 82) |
| HSL | hsl(109, 44%, 53%) |
| OKLCH | oklch(71.5% 0.164 139.9) |
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 #66BB52 | 2.38:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #66BB52 | 8.79:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #66BB52 text on white | 2.38:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #66BB52 text on black | 8.79:1 | AAA | Lc -55.2 | 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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E0EFDC
oklch(93.6% 0.03 139.1)
-
Step 200
200
#C6E3BF
oklch(88.5% 0.057 139.6)
-
Step 300
300
#9DD192
oklch(80.8% 0.102 140.1)
-
Step 400
400 (this color)
#66BB52
oklch(71.5% 0.164 139.9)
-
Step 500
500
#32A400
oklch(63% 0.202 139.9)
-
Step 600
600
#298A00
oklch(55.5% 0.178 139.9)
-
Step 700
700
#217400
oklch(49% 0.157 139.9)
-
Step 800
800
#1A5F00
oklch(42.6% 0.136 139.8)
-
Step 900
900
#145000
oklch(37.8% 0.121 139.9)
-
Step 950
950
#083000
oklch(27.1% 0.087 140)
#66BB52 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) | #C0AC48 | 0.113 |
| Deuteranopia (no green cones) | #B4A55A | 0.112 |
| Tritanopia (no blue cones) | #5FB5A4 | 0.111 |
| Achromatopsia (no color) | #A8A8A8 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB52
#66BB52
oklch(71.5% 0.164 139.9)
- #CF7EE2
#CF7EE2
oklch(71.5% 0.163 319.8)
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 #66BB52, closest first.
No curated palette has a color within ΔE 0.04 of #66BB52.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.015
- Leafy Green #51B73B ΔE 0.032
- Dark Mint #48C072 ΔE 0.035
- Boring Green #63B365 ΔE 0.036
- Cool Green #33B864 ΔE 0.040
- Algae Green #21C36F ΔE 0.042
- Soft Green #6FC276 ΔE 0.043
- Dark Pastel Green #56AE57 ΔE 0.043
Use #66BB52 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.