#66ABFA
Closest named color: Carolina Blue (#8AB8FE). oklch(72.9% 0.135 253), rgb(102, 171, 250).
Aa
Black text reads best on this color (8.77:1).
About this color
#66ABFA is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.135 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.054 away. Black text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 8.77:1 |
| White text | 2.39:1 |
Values
| HEX | #66ABFA |
| RGB | rgb(102, 171, 250) |
| HSL | hsl(212, 94%, 69%) |
| OKLCH | oklch(72.9% 0.135 253) |
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 #66ABFA | 2.39:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #66ABFA | 8.77:1 | AAA | Lc 57.0 | Large or bold text, headings |
| #66ABFA text on white | 2.39:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #66ABFA text on black | 8.77:1 | AAA | Lc -55.1 | 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
#9AC4F6
oklch(80.8% 0.084 253.2)
-
Step 400
400 (this color)
#66ABFA
oklch(72.9% 0.135 253)
-
Step 500
500
#298AEE
oklch(63% 0.174 253.2)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#04427B
oklch(37.8% 0.112 252.7)
-
Step 950
950
#072748
oklch(27% 0.071 252.7)
#66ABFA 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) | #8AAFFD | 0.041 |
| Deuteranopia (no green cones) | #76A1F8 | 0.028 |
| Tritanopia (no blue cones) | #00BDC7 | 0.113 |
| Achromatopsia (no color) | #A7A7A7 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ABFA
#66ABFA
oklch(72.9% 0.135 253)
- #DA9836
#DA9836
oklch(72.8% 0.135 72.8)
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 #66ABFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.059
- Periwinkle Blue #8F99FB ΔE 0.061
- Deep Sky Blue #00BFFF ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.068
- Lightblue #7BC8F6 ΔE 0.086
- Perrywinkle #8F8CE7 ΔE 0.086
- Vivid Sky Blue #4CC9F0 ΔE 0.087
Use #66ABFA 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.