#66FCC0
Closest named color: Light Aquamarine (#7BFDC7). oklch(89.5% 0.154 163.7), rgb(102, 252, 192).
Aa
Black text reads best on this color (16.25:1).
About this color
#66FCC0 is a light, vivid green. In OKLCH its lightness is 89%, its chroma 0.154 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Aquamarine (#7BFDC7), ΔE 0.019 away. Black text reads best on it, at 16.25:1.
| Hue family | Greens |
| Lightness | light (89%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Light Aquamarine (#7BFDC7) |
| Black text | 16.25:1 |
| White text | 1.29:1 |
Values
| HEX | #66FCC0 |
| RGB | rgb(102, 252, 192) |
| HSL | hsl(156, 96%, 69%) |
| OKLCH | oklch(89.5% 0.154 163.7) |
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 #66FCC0 | 1.29:1 | Fails | Lc -16.3 | Dividers and decoration only |
| Black text on #66FCC0 | 16.25:1 | AAA | Lc 89.5 | Fine for body text |
| #66FCC0 text on white | 1.29:1 | Fails | Lc 14.2 | Not readable |
| #66FCC0 text on black | 16.25:1 | AAA | Lc -89.7 | Fine for body text |
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 200.
-
Step 50
50
#E6FBF1
oklch(97% 0.026 165.7)
-
Step 100
100
#C8F7DF
oklch(93.7% 0.058 162.9)
-
Step 200
200 (this color)
#66FCC0
oklch(89.5% 0.154 163.7)
-
Step 300
300
#00E2A1
oklch(80.8% 0.173 163.7)
-
Step 400
400
#00BD86
oklch(70.7% 0.151 163.7)
-
Step 500
500
#00A272
oklch(63% 0.135 163.5)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F35
oklch(37.8% 0.082 162.9)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#66FCC0 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) | #F8EBBD | 0.151 |
| Deuteranopia (no green cones) | #E3DCC4 | 0.147 |
| Tritanopia (no blue cones) | #00FCEB | 0.061 |
| Achromatopsia (no color) | #E2E2E2 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66FCC0
#66FCC0
oklch(89.5% 0.154 163.7)
- #FFCAE8
#FFCAE8
oklch(89.4% 0.071 343.6)
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 #66FCC0, closest first.
No curated palette has a color within ΔE 0.04 of #66FCC0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Aquamarine #7BFDC7 ΔE 0.019
- Light Blue Green #7EFBB3 ΔE 0.020
- Seafoam #80F9AD ΔE 0.025
- Seafoam Green #7AF9AB ΔE 0.026
- Greenish Cyan #2AFEB7 ΔE 0.030
- Bright Teal #01F9C6 ΔE 0.034
- Aquamarine #7FFFD4 ΔE 0.034
- Light Turquoise #7EF4CC ΔE 0.035
Use #66FCC0 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.