#66BED5
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.5% 0.091 216.9), rgb(102, 190, 213).
Aa
Black text reads best on this color (9.89:1).
About this color
#66BED5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.091 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.042 away. Black text reads best on it, at 9.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.89:1 |
| White text | 2.12:1 |
Values
| HEX | #66BED5 |
| RGB | rgb(102, 190, 213) |
| HSL | hsl(192, 57%, 62%) |
| OKLCH | oklch(75.5% 0.091 216.9) |
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 #66BED5 | 2.12:1 | Fails | Lc -46.1 | Large or bold text, headings |
| Black text on #66BED5 | 9.89:1 | AAA | Lc 62.5 | Content text, not long reading |
| #66BED5 text on white | 2.12:1 | Fails | Lc 41.5 | Non-text elements, placeholder text |
| #66BED5 text on black | 9.89:1 | AAA | Lc -60.8 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF1
oklch(93.6% 0.017 215.5)
-
Step 200
200
#C3DFE7
oklch(88.6% 0.032 216.8)
-
Step 300
300
#97CAD9
oklch(80.8% 0.057 217.8)
-
Step 400
400 (this color)
#66BED5
oklch(75.5% 0.091 216.9)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#66BED5 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) | #AEB9D6 | 0.079 |
| Deuteranopia (no green cones) | #9EACD5 | 0.073 |
| Tritanopia (no blue cones) | #17C6C5 | 0.055 |
| Achromatopsia (no color) | #B2B2B2 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BED5
#66BED5
oklch(75.5% 0.091 216.9)
- #E29B87
#E29B87
oklch(75.4% 0.09 36.4)
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 #66BED5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.042
- Light Cornflower Blue #98C1D9 ΔE 0.054
- Lightblue #7BC8F6 ΔE 0.056
- Light Grey Blue #9DBCD4 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.058
- Medium Turquoise #48D1CC ΔE 0.061
- Sky Blue #87CEEB ΔE 0.062
- Bright Sky Blue #02CCFE ΔE 0.065
Use #66BED5 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.