#66ABB3
Closest named color: Greyblue (#77A1B5). oklch(69.9% 0.071 205.2), rgb(102, 171, 179).
Aa
Black text reads best on this color (8.04:1).
About this color
#66ABB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.071 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.033 away. Black text reads best on it, at 8.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.04:1 |
| White text | 2.61:1 |
Values
| HEX | #66ABB3 |
| RGB | rgb(102, 171, 179) |
| HSL | hsl(186, 34%, 55%) |
| OKLCH | oklch(69.9% 0.071 205.2) |
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 #66ABB3 | 2.61:1 | Fails | Lc -56.0 | Large or bold text, headings |
| Black text on #66ABB3 | 8.04:1 | AAA | Lc 53.2 | Large or bold text, headings |
| #66ABB3 text on white | 2.61:1 | Fails | Lc 50.9 | Large or bold text, headings |
| #66ABB3 text on black | 8.04:1 | AAA | Lc -51.1 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C7DEE1
oklch(88.4% 0.025 206.2)
-
Step 300
300
#A0C9CE
oklch(80.8% 0.044 205.5)
-
Step 400
400 (this color)
#66ABB3
oklch(69.9% 0.071 205.2)
-
Step 500
500
#3799A4
oklch(63.1% 0.09 205.7)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#0E4A50
oklch(37.6% 0.058 205.1)
-
Step 950
950
#0C2C2F
oklch(27.1% 0.037 203.8)
#66ABB3 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) | #A1A6B4 | 0.070 |
| Deuteranopia (no green cones) | #949CB3 | 0.064 |
| Tritanopia (no blue cones) | #42B0AD | 0.034 |
| Achromatopsia (no color) | #A0A0A0 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ABB3
#66ABB3
oklch(69.9% 0.071 205.2)
- #C68D88
#C68D88
oklch(69.8% 0.07 24.6)
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 #66ABB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.033
- Bluegrey #85A3B2 ΔE 0.038
- Cadet Blue #5F9EA0 ΔE 0.042
- Bluey Grey #89A0B0 ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.049
- Light Sea Green #20B2AA ΔE 0.051
- Cool Grey #95A3A6 ΔE 0.055
- Cool Steel #97A7B3 ΔE 0.056
Use #66ABB3 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.