#66DFF1
Closest named color: Robin's Egg (#6DEDFD). oklch(84.1% 0.111 208.5), rgb(102, 223, 241).
Aa
Black text reads best on this color (13.39:1).
About this color
#66DFF1 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.111 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.039 away. Black text reads best on it, at 13.39:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 13.39:1 |
| White text | 1.56:1 |
Values
| HEX | #66DFF1 |
| RGB | rgb(102, 223, 241) |
| HSL | hsl(188, 83%, 67%) |
| OKLCH | oklch(84.1% 0.111 208.5) |
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 #66DFF1 | 1.56:1 | Fails | Lc -29.1 | Dividers and decoration only |
| Black text on #66DFF1 | 13.39:1 | AAA | Lc 78.1 | Fine for body text |
| #66DFF1 text on white | 1.56:1 | Fails | Lc 25.7 | Dividers and decoration only |
| #66DFF1 text on black | 13.39:1 | AAA | Lc -77.4 | 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 300.
-
Step 50
50
#EBF8FB
oklch(97% 0.014 213.1)
-
Step 100
100
#D2F0F5
oklch(93.5% 0.032 208.7)
-
Step 200
200
#AAE5EF
oklch(88.5% 0.061 209.1)
-
Step 300
300 (this color)
#66DFF1
oklch(84.1% 0.111 208.5)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C32
oklch(26.8% 0.046 208.8)
#66DFF1 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) | #CED7F2 | 0.106 |
| Deuteranopia (no green cones) | #B9C8F1 | 0.097 |
| Tritanopia (no blue cones) | #00E8E4 | 0.049 |
| Achromatopsia (no color) | #CECECE | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DFF1
#66DFF1
oklch(84.1% 0.111 208.5)
- #FFB6AB
#FFB6AB
oklch(84.2% 0.087 28.6)
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 #66DFF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.039
- Aqua Blue #02D8E9 ΔE 0.046
- Sky Blue #87CEEB ΔE 0.048
- Turquoise #40E0D0 ΔE 0.056
- Light Sky Blue #87CEFA ΔE 0.056
- Robin Egg Blue #8AF1FE ΔE 0.060
- Celeste #A8DADC ΔE 0.061
- Bright Light Blue #26F7FD ΔE 0.063
Use #66DFF1 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.