#66A2AA
Closest named color: Cadet Blue (#5F9EA0). oklch(67.4% 0.063 206.5), rgb(102, 162, 170).
Aa
Black text reads best on this color (7.31:1).
About this color
#66A2AA is a medium-light, muted teal or cyan. In OKLCH its lightness is 67%, its chroma 0.063 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.019 away. Black text reads best on it, at 7.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.31:1 |
| White text | 2.87:1 |
Values
| HEX | #66A2AA |
| RGB | rgb(102, 162, 170) |
| HSL | hsl(187, 29%, 53%) |
| OKLCH | oklch(67.4% 0.063 206.5) |
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 #66A2AA | 2.87:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #66A2AA | 7.31:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #66A2AA text on white | 2.87:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #66A2AA text on black | 7.31:1 | AAA | Lc -47.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#C9DEE0
oklch(88.6% 0.023 203.7)
-
Step 300
300
#A4C8CD
oklch(80.8% 0.039 206.8)
-
Step 400
400 (this color)
#66A2AA
oklch(67.4% 0.063 206.5)
-
Step 500
500
#4597A2
oklch(63% 0.081 207.1)
-
Step 600
600
#1D828D
oklch(55.7% 0.088 206.1)
-
Step 700
700
#0A6D78
oklch(49% 0.082 207.3)
-
Step 800
800
#115961
oklch(42.6% 0.067 206.3)
-
Step 900
900
#184950
oklch(37.6% 0.053 208.3)
-
Step 950
950
#102B2F
oklch(27% 0.033 208.2)
#66A2AA 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) | #999DAB | 0.063 |
| Deuteranopia (no green cones) | #8D95AA | 0.056 |
| Tritanopia (no blue cones) | #49A7A4 | 0.031 |
| Achromatopsia (no color) | #989898 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A2AA
#66A2AA
oklch(67.4% 0.063 206.5)
- #BB8882
#BB8882
oklch(67.5% 0.064 26.4)
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 #66A2AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.019
- Greyblue #77A1B5 ΔE 0.027
- Bluegrey #85A3B2 ΔE 0.039
- Dull Teal #5F9E8F ΔE 0.041
- Bluey Grey #89A0B0 ΔE 0.043
- Grey Teal #5E9B8A ΔE 0.049
- Cool Gray #8D99AE ΔE 0.052
- Cool Grey #95A3A6 ΔE 0.056
Use #66A2AA 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.