#66CBFE
Closest named color: Lightblue (#7BC8F6). oklch(80.1% 0.119 232.9), rgb(102, 203, 254).
Aa
Black text reads best on this color (11.53:1).
About this color
#66CBFE is a light, moderately saturated blue. In OKLCH its lightness is 80%, its chroma 0.119 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.019 away. Black text reads best on it, at 11.53:1.
| Hue family | Blues |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.53:1 |
| White text | 1.81:1 |
Values
| HEX | #66CBFE |
| RGB | rgb(102, 203, 254) |
| HSL | hsl(200, 99%, 70%) |
| OKLCH | oklch(80.1% 0.119 232.9) |
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 #66CBFE | 1.81:1 | Fails | Lc -37.8 | Non-text elements, placeholder text |
| Black text on #66CBFE | 11.53:1 | AAA | Lc 70.1 | Content text, not long reading |
| #66CBFE text on white | 1.81:1 | Fails | Lc 33.7 | Non-text elements, placeholder text |
| #66CBFE text on black | 11.53:1 | AAA | Lc -68.9 | Content text, not long reading |
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
#ECF8FF
oklch(97.2% 0.016 233)
-
Step 100
100
#D4EEFD
oklch(93.5% 0.034 233)
-
Step 200
200
#AEE1FE
oklch(88.4% 0.066 233.4)
-
Step 300
300 (this color)
#66CBFE
oklch(80.1% 0.119 232.9)
-
Step 400
400
#00AEEC
oklch(70.6% 0.146 233.1)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#66CBFE 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) | #B2C9FF | 0.078 |
| Deuteranopia (no green cones) | #9DB9FD | 0.067 |
| Tritanopia (no blue cones) | #00D9DC | 0.082 |
| Achromatopsia (no color) | #C0C0C0 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CBFE
#66CBFE
oklch(80.1% 0.119 232.9)
- #FAA874
#FAA874
oklch(80.1% 0.118 52.7)
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 #66CBFE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.019
- Sky #82CAFC ΔE 0.024
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Light Sky Blue #87CEFA ΔE 0.032
- Bright Sky Blue #02CCFE ΔE 0.039
- Sky Blue #87CEEB ΔE 0.041
- Carolina Blue #8AB8FE ΔE 0.057
- Deep Sky Blue #00BFFF ΔE 0.058
Use #66CBFE 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.