#66FAC9
Closest named color: Light Aquamarine (#7BFDC7). oklch(89.2% 0.145 168), rgb(102, 250, 201).
Aa
Black text reads best on this color (16.08:1).
About this color
#66FAC9 is a light, vivid green. In OKLCH its lightness is 89%, its chroma 0.145 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Aquamarine (#7BFDC7), ΔE 0.018 away. Black text reads best on it, at 16.08:1.
| Hue family | Greens |
| Lightness | light (89%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Light Aquamarine (#7BFDC7) |
| Black text | 16.08:1 |
| White text | 1.30:1 |
Values
| HEX | #66FAC9 |
| RGB | rgb(102, 250, 201) |
| HSL | hsl(160, 94%, 69%) |
| OKLCH | oklch(89.2% 0.145 168) |
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 #66FAC9 | 1.30:1 | Fails | Lc -17.0 | Dividers and decoration only |
| Black text on #66FAC9 | 16.08:1 | AAA | Lc 88.8 | Fine for body text |
| #66FAC9 text on white | 1.30:1 | Fails | Lc 14.8 | Not readable |
| #66FAC9 text on black | 16.08:1 | AAA | Lc -89.0 | 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
#E6FBF2
oklch(97% 0.025 168.3)
-
Step 100
100
#C8F6E3
oklch(93.6% 0.054 168.1)
-
Step 200
200 (this color)
#66FAC9
oklch(89.2% 0.145 168)
-
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)
#66FAC9 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) | #F4EAC7 | 0.147 |
| Deuteranopia (no green cones) | #DFDBCC | 0.141 |
| Tritanopia (no blue cones) | #00FBEC | 0.051 |
| Achromatopsia (no color) | #E1E1E1 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66FAC9
#66FAC9
oklch(89.2% 0.145 168)
- #FFCAE3
#FFCAE3
oklch(89.3% 0.068 348.6)
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 #66FAC9, closest first.
No curated palette has a color within ΔE 0.04 of #66FAC9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Aquamarine #7BFDC7 ΔE 0.018
- Light Turquoise #7EF4CC ΔE 0.024
- Aquamarine #7FFFD4 ΔE 0.027
- Light Blue Green #7EFBB3 ΔE 0.031
- Bright Teal #01F9C6 ΔE 0.033
- Seafoam #80F9AD ΔE 0.036
- Seafoam Green #7AF9AB ΔE 0.038
- Greenish Cyan #2AFEB7 ΔE 0.041
Use #66FAC9 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.