#66B2FF
Closest named color: Carolina Blue (#8AB8FE). oklch(74.7% 0.135 250.4), rgb(102, 178, 255).
Aa
Black text reads best on this color (9.37:1).
About this color
#66B2FF is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.135 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.042 away. Black text reads best on it, at 9.37:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 9.37:1 |
| White text | 2.23:1 |
Values
| HEX | #66B2FF |
| RGB | rgb(102, 178, 255) |
| HSL | hsl(210, 100%, 70%) |
| OKLCH | oklch(74.7% 0.135 250.4) |
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 #66B2FF | 2.23:1 | Fails | Lc -48.7 | Large or bold text, headings |
| Black text on #66B2FF | 9.37:1 | AAA | Lc 60.0 | Content text, not long reading |
| #66B2FF text on white | 2.23:1 | Fails | Lc 43.9 | Non-text elements, placeholder text |
| #66B2FF text on black | 9.37:1 | AAA | Lc -58.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C3DCF8
oklch(88.5% 0.047 251.3)
-
Step 300
300
#97C5F6
oklch(80.9% 0.085 250.5)
-
Step 400
400 (this color)
#66B2FF
oklch(74.7% 0.135 250.4)
-
Step 500
500
#178CED
oklch(63.1% 0.173 250.6)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508E
oklch(42.6% 0.122 250.5)
-
Step 900
900
#004378
oklch(37.8% 0.108 250.3)
-
Step 950
950
#042748
oklch(26.9% 0.073 251.2)
#66B2FF 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) | #91B5FF | 0.047 |
| Deuteranopia (no green cones) | #7DA7FD | 0.034 |
| Tritanopia (no blue cones) | #00C4CD | 0.110 |
| Achromatopsia (no color) | #ADADAD | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B2FF
#66B2FF
oklch(74.7% 0.135 250.4)
- #E39C3F
#E39C3F
oklch(74.6% 0.136 69.9)
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 #66B2FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.070
- Vivid Sky Blue #4CC9F0 ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.073
- Sky #82CAFC ΔE 0.075
- Bright Sky Blue #02CCFE ΔE 0.076
- Cornflower Blue #6495ED ΔE 0.077
Use #66B2FF 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.