#66F2E5
Closest named color: Bright Aqua (#0BF9EA). oklch(88.1% 0.123 186.8), rgb(102, 242, 229).
Aa
Black text reads best on this color (15.39:1).
About this color
#66F2E5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 88%, its chroma 0.123 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.031 away. Black text reads best on it, at 15.39:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.39:1 |
| White text | 1.36:1 |
Values
| HEX | #66F2E5 |
| RGB | rgb(102, 242, 229) |
| HSL | hsl(174, 84%, 67%) |
| OKLCH | oklch(88.1% 0.123 186.8) |
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 #66F2E5 | 1.36:1 | Fails | Lc -20.0 | Dividers and decoration only |
| Black text on #66F2E5 | 15.39:1 | AAA | Lc 86.2 | Fine for body text |
| #66F2E5 text on white | 1.36:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #66F2E5 text on black | 15.39:1 | AAA | Lc -86.1 | 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
#E7FAF8
oklch(97.1% 0.02 189.2)
-
Step 100
100
#C9F4EF
oklch(93.6% 0.045 187.8)
-
Step 200
200 (this color)
#66F2E5
oklch(88.1% 0.123 186.8)
-
Step 300
300
#00DDCF
oklch(80.8% 0.141 186.7)
-
Step 400
400
#00B9AD
oklch(70.7% 0.124 186.6)
-
Step 500
500
#009F94
oklch(63.2% 0.111 186.2)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#66F2E5 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) | #E6E6E5 | 0.130 |
| Deuteranopia (no green cones) | #D1D6E7 | 0.123 |
| Tritanopia (no blue cones) | #00F7EE | 0.030 |
| Achromatopsia (no color) | #DDDDDD | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66F2E5
#66F2E5
oklch(88.1% 0.123 186.8)
- #FFC7D0
#FFC7D0
oklch(88.2% 0.065 7.7)
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 #66F2E5, closest first.
No curated palette has a color within ΔE 0.04 of #66F2E5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.031
- Bright Light Blue #26F7FD ΔE 0.036
- Bright Cyan #41FDFE ΔE 0.038
- Light Turquoise #7EF4CC ΔE 0.038
- Bright Turquoise #0FFEF9 ΔE 0.039
- Robin's Egg #6DEDFD ΔE 0.041
- Cyan #00FFFF ΔE 0.044
- Robin Egg Blue #8AF1FE ΔE 0.048
Use #66F2E5 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.