#66ADFA
Closest named color: Carolina Blue (#8AB8FE). oklch(73.4% 0.133 251.8), rgb(102, 173, 250).
Aa
Black text reads best on this color (8.92:1).
About this color
#66ADFA is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.133 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.051 away. Black text reads best on it, at 8.92:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 8.92:1 |
| White text | 2.35:1 |
Values
| HEX | #66ADFA |
| RGB | rgb(102, 173, 250) |
| HSL | hsl(211, 94%, 69%) |
| OKLCH | oklch(73.4% 0.133 251.8) |
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 #66ADFA | 2.35:1 | Fails | Lc -51.1 | Large or bold text, headings |
| Black text on #66ADFA | 8.92:1 | AAA | Lc 57.8 | Large or bold text, headings |
| #66ADFA text on white | 2.35:1 | Fails | Lc 46.2 | Large or bold text, headings |
| #66ADFA text on black | 8.92:1 | AAA | Lc -55.9 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#99C5F5
oklch(80.9% 0.083 251)
-
Step 400
400 (this color)
#66ADFA
oklch(73.4% 0.133 251.8)
-
Step 500
500
#258BEC
oklch(63% 0.171 252)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#01427A
oklch(37.7% 0.112 251.9)
-
Step 950
950
#062747
oklch(26.9% 0.07 251.5)
#66ADFA 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) | #8CB1FD | 0.043 |
| Deuteranopia (no green cones) | #79A2F8 | 0.032 |
| Tritanopia (no blue cones) | #00BFC8 | 0.111 |
| Achromatopsia (no color) | #A9A9A9 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ADFA
#66ADFA
oklch(73.4% 0.133 251.8)
- #DC993B
#DC993B
oklch(73.2% 0.133 71.7)
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 #66ADFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.051
- Deep Sky Blue #00BFFF ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.064
- Periwinkle Blue #8F99FB ΔE 0.065
- Chefchaouen Blue #4895EF ΔE 0.073
- Lightblue #7BC8F6 ΔE 0.081
- Vivid Sky Blue #4CC9F0 ΔE 0.082
- Pastel Blue #A2BFFE ΔE 0.086
Use #66ADFA 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.