#66AAA0
Closest named color: Cadet Blue (#5F9EA0). oklch(69% 0.071 183.8), rgb(102, 170, 160).
Aa
Black text reads best on this color (7.82:1).
About this color
#66AAA0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.071 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.037 away. Black text reads best on it, at 7.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.82:1 |
| White text | 2.68:1 |
Values
| HEX | #66AAA0 |
| RGB | rgb(102, 170, 160) |
| HSL | hsl(171, 29%, 53%) |
| OKLCH | oklch(69% 0.071 183.8) |
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 #66AAA0 | 2.68:1 | Fails | Lc -57.2 | Large or bold text, headings |
| Black text on #66AAA0 | 7.82:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #66AAA0 text on white | 2.68:1 | Fails | Lc 52.0 | Large or bold text, headings |
| #66AAA0 text on black | 7.82:1 | AAA | Lc -49.9 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C8DFDB
oklch(88.5% 0.025 184.2)
-
Step 300
300
#A1CAC4
oklch(80.8% 0.044 185.4)
-
Step 400
400 (this color)
#66AAA0
oklch(69% 0.071 183.8)
-
Step 500
500
#3C9B8F
oklch(63% 0.091 183.7)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#114C45
oklch(37.8% 0.06 183.5)
-
Step 950
950
#0D2C28
oklch(26.9% 0.037 183.8)
#66AAA0 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) | #A4A3A0 | 0.076 |
| Deuteranopia (no green cones) | #989AA1 | 0.072 |
| Tritanopia (no blue cones) | #4CADA7 | 0.022 |
| Achromatopsia (no color) | #9E9E9E | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AAA0
#66AAA0
oklch(69% 0.071 183.8)
- #C28996
#C28996
oklch(69% 0.072 4.1)
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 #66AAA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.037
- Dull Teal #5F9E8F ΔE 0.039
- Light Sea Green #20B2AA ΔE 0.044
- Greeny Blue #42B395 ΔE 0.045
- Grey Teal #5E9B8A ΔE 0.048
- Greyblue #77A1B5 ΔE 0.051
- Bluegrey #85A3B2 ΔE 0.052
- Tea #65AB7C ΔE 0.053
Use #66AAA0 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.