#66BFD2
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.6% 0.089 213.3), rgb(102, 191, 210).
Aa
Black text reads best on this color (9.94:1).
About this color
#66BFD2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.089 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.044 away. Black text reads best on it, at 9.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.94:1 |
| White text | 2.11:1 |
Values
| HEX | #66BFD2 |
| RGB | rgb(102, 191, 210) |
| HSL | hsl(191, 55%, 61%) |
| OKLCH | oklch(75.6% 0.089 213.3) |
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 #66BFD2 | 2.11:1 | Fails | Lc -45.8 | Large or bold text, headings |
| Black text on #66BFD2 | 9.94:1 | AAA | Lc 62.8 | Content text, not long reading |
| #66BFD2 text on white | 2.11:1 | Fails | Lc 41.2 | Non-text elements, placeholder text |
| #66BFD2 text on black | 9.94:1 | AAA | Lc -61.1 | 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 400.
-
Step 50
50
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C3DFE5
oklch(88.5% 0.031 212.1)
-
Step 300
300
#97CBD6
oklch(81% 0.056 212.1)
-
Step 400
400 (this color)
#66BFD2
oklch(75.6% 0.089 213.3)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#66BFD2 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) | #B0BAD3 | 0.081 |
| Deuteranopia (no green cones) | #A0ADD2 | 0.075 |
| Tritanopia (no blue cones) | #1CC7C5 | 0.051 |
| Achromatopsia (no color) | #B2B2B2 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BFD2
#66BFD2
oklch(75.6% 0.089 213.3)
- #E39B8B
#E39B8B
oklch(75.6% 0.09 33)
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 #66BFD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.044
- Light Cornflower Blue #98C1D9 ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.056
- Light Grey Blue #9DBCD4 ΔE 0.057
- Lightblue #7BC8F6 ΔE 0.059
- Sky Blue #87CEEB ΔE 0.062
- Bright Sky Blue #02CCFE ΔE 0.068
Use #66BFD2 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.