#66AEEA
Closest named color: Carolina Blue (#8AB8FE). oklch(72.8% 0.114 245.4), rgb(102, 174, 234).
Aa
Black text reads best on this color (8.80:1).
About this color
#66AEEA is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.114 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.056 away. Black text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 8.80:1 |
| White text | 2.38:1 |
Values
| HEX | #66AEEA |
| RGB | rgb(102, 174, 234) |
| HSL | hsl(207, 76%, 66%) |
| OKLCH | oklch(72.8% 0.114 245.4) |
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 #66AEEA | 2.38:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #66AEEA | 8.80:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #66AEEA text on white | 2.38:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #66AEEA text on black | 8.80:1 | AAA | Lc -55.2 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DCF2
oklch(88.4% 0.04 245.9)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400 (this color)
#66AEEA
oklch(72.8% 0.114 245.4)
-
Step 500
500
#2690DB
oklch(63.2% 0.145 245.3)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#014570
oklch(37.7% 0.095 245.1)
-
Step 950
950
#072942
oklch(27.1% 0.06 245.2)
#66AEEA 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) | #94AFED | 0.051 |
| Deuteranopia (no green cones) | #83A2E9 | 0.041 |
| Tritanopia (no blue cones) | #00BCC3 | 0.093 |
| Achromatopsia (no color) | #A8A8A8 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AEEA
#66AEEA
oklch(72.8% 0.114 245.4)
- #D89855
#D89855
oklch(72.9% 0.114 65.6)
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 #66AEEA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.056
- Deep Sky Blue #00BFFF ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.070
- Vivid Sky Blue #4CC9F0 ΔE 0.072
- Lightblue #7BC8F6 ΔE 0.075
- Greyblue #77A1B5 ΔE 0.077
- Periwinkle Blue #8F99FB ΔE 0.077
- Chefchaouen Blue #4895EF ΔE 0.079
Use #66AEEA 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.