#66AAAE
Closest named color: Greyblue (#77A1B5). oklch(69.4% 0.069 200.5), rgb(102, 170, 174).
Aa
Black text reads best on this color (7.92:1).
About this color
#66AAAE is a medium-light, muted teal or cyan. In OKLCH its lightness is 69%, its chroma 0.069 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.035 away. Black text reads best on it, at 7.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.92:1 |
| White text | 2.64:1 |
Values
| HEX | #66AAAE |
| RGB | rgb(102, 170, 174) |
| HSL | hsl(183, 31%, 54%) |
| OKLCH | oklch(69.4% 0.069 200.5) |
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 #66AAAE | 2.64:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #66AAAE | 7.92:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #66AAAE text on white | 2.64:1 | Fails | Lc 51.5 | Large or bold text, headings |
| #66AAAE text on black | 7.92:1 | AAA | Lc -50.4 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1EDED
oklch(93.7% 0.013 196.9)
-
Step 200
200
#C8DEDF
oklch(88.5% 0.024 200.1)
-
Step 300
300
#A1CACC
oklch(81% 0.043 200)
-
Step 400
400 (this color)
#66AAAE
oklch(69.4% 0.069 200.5)
-
Step 500
500
#39999F
oklch(63% 0.088 201)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006F74
oklch(49.2% 0.084 200.3)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#104B4E
oklch(37.8% 0.058 200.1)
-
Step 950
950
#0C2C2E
oklch(27.1% 0.037 201)
#66AAAE 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) | #A1A4AE | 0.071 |
| Deuteranopia (no green cones) | #949BAE | 0.065 |
| Tritanopia (no blue cones) | #45AFAB | 0.030 |
| Achromatopsia (no color) | #9F9F9F | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AAAE
#66AAAE
oklch(69.4% 0.069 200.5)
- #C48C8B
#C48C8B
oklch(69.5% 0.069 20.1)
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 #66AAAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.035
- Cadet Blue #5F9EA0 ΔE 0.037
- Bluegrey #85A3B2 ΔE 0.040
- Bluey Grey #89A0B0 ΔE 0.047
- Light Sea Green #20B2AA ΔE 0.049
- Dull Teal #5F9E8F ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.051
- Cool Grey #95A3A6 ΔE 0.054
Use #66AAAE 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.