#66B0CD
Closest named color: Greyblue (#77A1B5). oklch(72% 0.085 225.4), rgb(102, 176, 205).
Aa
Black text reads best on this color (8.65:1).
About this color
#66B0CD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.085 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.046 away. Black text reads best on it, at 8.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.65:1 |
| White text | 2.42:1 |
Values
| HEX | #66B0CD |
| RGB | rgb(102, 176, 205) |
| HSL | hsl(197, 51%, 60%) |
| OKLCH | oklch(72% 0.085 225.4) |
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 #66B0CD | 2.42:1 | Fails | Lc -52.6 | Large or bold text, headings |
| Black text on #66B0CD | 8.65:1 | AAA | Lc 56.4 | Large or bold text, headings |
| #66B0CD text on white | 2.42:1 | Fails | Lc 47.6 | Large or bold text, headings |
| #66B0CD text on black | 8.65:1 | AAA | Lc -54.4 | 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
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C6DEE8
oklch(88.6% 0.029 224.7)
-
Step 300
300
#9CC8DB
oklch(80.8% 0.054 226.2)
-
Step 400
400 (this color)
#66B0CD
oklch(72% 0.085 225.4)
-
Step 500
500
#2996BB
oklch(63% 0.109 225.9)
-
Step 600
600
#007FA2
oklch(55.5% 0.106 225.7)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#02495E
oklch(37.8% 0.071 225.3)
-
Step 950
950
#082B37
oklch(27.1% 0.045 225.2)
#66B0CD 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) | #A0ADCF | 0.066 |
| Deuteranopia (no green cones) | #91A1CD | 0.059 |
| Tritanopia (no blue cones) | #2BB9B9 | 0.059 |
| Achromatopsia (no color) | #A6A6A6 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B0CD
#66B0CD
oklch(72% 0.085 225.4)
- #D29478
#D29478
oklch(72% 0.085 45.2)
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 #66B0CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.058
- Cool Steel #97A7B3 ΔE 0.061
- Cool Grey #95A3A6 ΔE 0.071
- Vivid Sky Blue #4CC9F0 ΔE 0.072
- Cool Gray #8D99AE ΔE 0.073
Use #66B0CD 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.