#66B2CB
Closest named color: Greyblue (#77A1B5). oklch(72.4% 0.084 221.4), rgb(102, 178, 203).
Aa
Black text reads best on this color (8.79:1).
About this color
#66B2CB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.084 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.049 away. Black text reads best on it, at 8.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.79:1 |
| White text | 2.38:1 |
Values
| HEX | #66B2CB |
| RGB | rgb(102, 178, 203) |
| HSL | hsl(195, 49%, 60%) |
| OKLCH | oklch(72.4% 0.084 221.4) |
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 #66B2CB | 2.38:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #66B2CB | 8.79:1 | AAA | Lc 57.1 | Large or bold text, headings |
| #66B2CB text on white | 2.38:1 | Fails | Lc 46.9 | Large or bold text, headings |
| #66B2CB text on black | 8.79:1 | AAA | Lc -55.1 | 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
#F1F7F9
oklch(97.2% 0.007 219.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C5DEE7
oklch(88.5% 0.029 221.4)
-
Step 300
300
#9CC9D9
oklch(80.9% 0.052 221.7)
-
Step 400
400 (this color)
#66B2CB
oklch(72.4% 0.084 221.4)
-
Step 500
500
#2598B7
oklch(63.2% 0.107 220.9)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#072B36
oklch(27% 0.044 222.7)
#66B2CB 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) | #A3AECC | 0.069 |
| Deuteranopia (no green cones) | #94A3CB | 0.062 |
| Tritanopia (no blue cones) | #2DBABA | 0.054 |
| Achromatopsia (no color) | #A8A8A8 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B2CB
#66B2CB
oklch(72.4% 0.084 221.4)
- #D3947D
#D3947D
oklch(72.3% 0.083 40.9)
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 #66B2CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.049
- Turquoise Blue #06B1C4 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.060
- Cool Steel #97A7B3 ΔE 0.060
- Vivid Sky Blue #4CC9F0 ΔE 0.070
- Cool Grey #95A3A6 ΔE 0.070
- Light Grey Blue #9DBCD4 ΔE 0.070
Use #66B2CB 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.