#66AA91
Closest named color: Tea (#65AB7C). oklch(68.5% 0.079 168.5), rgb(102, 170, 145).
Aa
Black text reads best on this color (7.72:1).
About this color
#66AA91 is a medium-light, moderately saturated green. In OKLCH its lightness is 69%, its chroma 0.079 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tea (#65AB7C), ΔE 0.031 away. Black text reads best on it, at 7.72:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.079) |
| Temperature | in between |
| Nearest name | Tea (#65AB7C) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #66AA91 |
| RGB | rgb(102, 170, 145) |
| HSL | hsl(158, 29%, 53%) |
| OKLCH | oklch(68.5% 0.079 168.5) |
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 #66AA91 | 2.71:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #66AA91 | 7.72:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #66AA91 text on white | 2.71:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #66AA91 text on black | 7.72:1 | AAA | Lc -49.3 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE8
oklch(93.6% 0.014 169.2)
-
Step 200
200
#C9DFD6
oklch(88.5% 0.026 169.2)
-
Step 300
300
#A2CBBB
oklch(80.8% 0.049 169.3)
-
Step 400
400 (this color)
#66AA91
oklch(68.5% 0.079 168.5)
-
Step 500
500
#3E9D7E
oklch(63.1% 0.102 168.4)
-
Step 600
600
#098767
oklch(55.5% 0.11 168.4)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#045D46
oklch(42.6% 0.084 168.4)
-
Step 900
900
#134D3B
oklch(37.8% 0.067 168.1)
-
Step 950
950
#0E2D23
oklch(27% 0.042 169.1)
#66AA91 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) | #A7A290 | 0.081 |
| Deuteranopia (no green cones) | #9C9A93 | 0.077 |
| Tritanopia (no blue cones) | #52ABA3 | 0.028 |
| Achromatopsia (no color) | #9D9D9D | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AA91
#66AA91
oklch(68.5% 0.079 168.5)
- #BF86A2
#BF86A2
oklch(68.5% 0.079 348.4)
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 #66AA91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tea #65AB7C ΔE 0.031
- Greeny Blue #42B395 ΔE 0.034
- Dull Teal #5F9E8F ΔE 0.036
- Greeny Grey #7EA07A ΔE 0.039
- Dusty Green #76A973 ΔE 0.041
- Grey Green #86A17D ΔE 0.042
- Grey Teal #5E9B8A ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.048
Use #66AA91 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.