#66EFC1
Closest named color: Light Turquoise (#7EF4CC). oklch(86.4% 0.137 168), rgb(102, 239, 193).
Aa
Black text reads best on this color (14.68:1).
About this color
#66EFC1 is a light, moderately saturated green. In OKLCH its lightness is 86%, its chroma 0.137 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Turquoise (#7EF4CC), ΔE 0.028 away. Black text reads best on it, at 14.68:1.
| Hue family | Greens |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Light Turquoise (#7EF4CC) |
| Black text | 14.68:1 |
| White text | 1.43:1 |
Values
| HEX | #66EFC1 |
| RGB | rgb(102, 239, 193) |
| HSL | hsl(160, 81%, 67%) |
| OKLCH | oklch(86.4% 0.137 168) |
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 #66EFC1 | 1.43:1 | Fails | Lc -23.2 | Dividers and decoration only |
| Black text on #66EFC1 | 14.68:1 | AAA | Lc 83.3 | Fine for body text |
| #66EFC1 text on white | 1.43:1 | Fails | Lc 20.4 | Dividers and decoration only |
| #66EFC1 text on black | 14.68:1 | AAA | Lc -83.0 | 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
#E7FBF2
oklch(97.1% 0.024 167.1)
-
Step 100
100
#CAF5E3
oklch(93.5% 0.051 167.9)
-
Step 200
200 (this color)
#66EFC1
oklch(86.4% 0.137 168)
-
Step 300
300
#00E1AC
oklch(80.8% 0.163 168.1)
-
Step 400
400
#00BC8F
oklch(70.6% 0.143 168)
-
Step 500
500
#00A17A
oklch(63% 0.128 168)
-
Step 600
600
#008866
oklch(55.6% 0.113 167.6)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#66EFC1 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) | #EAE0BF | 0.139 |
| Deuteranopia (no green cones) | #D6D2C4 | 0.133 |
| Tritanopia (no blue cones) | #10F0E2 | 0.049 |
| Achromatopsia (no color) | #D8D8D8 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66EFC1
#66EFC1
oklch(86.4% 0.137 168)
- #FFBBDD
#FFBBDD
oklch(86.4% 0.089 347.7)
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 #66EFC1, closest first.
No curated palette has a color within ΔE 0.04 of #66EFC1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Turquoise #7EF4CC ΔE 0.028
- Bright Teal #01F9C6 ΔE 0.036
- Aqua Marine #2EE8BB ΔE 0.037
- Light Teal #90E4C1 ΔE 0.042
- Light Aquamarine #7BFDC7 ΔE 0.043
- Light Blue Green #7EFBB3 ΔE 0.047
- Seafoam #80F9AD ΔE 0.047
- Hospital Green #9BE5AA ΔE 0.048
Use #66EFC1 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.