#66C19A
Closest named color: Medium Aquamarine (#66CDAA). oklch(74.4% 0.105 164), rgb(102, 193, 154).
Aa
Black text reads best on this color (9.65:1).
About this color
#66C19A is a medium-light, moderately saturated green. In OKLCH its lightness is 74%, its chroma 0.105 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.035 away. Black text reads best on it, at 9.65:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 9.65:1 |
| White text | 2.17:1 |
Values
| HEX | #66C19A |
| RGB | rgb(102, 193, 154) |
| HSL | hsl(154, 42%, 58%) |
| OKLCH | oklch(74.4% 0.105 164) |
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 #66C19A | 2.17:1 | Fails | Lc -47.3 | Large or bold text, headings |
| Black text on #66C19A | 9.65:1 | AAA | Lc 61.4 | Content text, not long reading |
| #66C19A text on white | 2.17:1 | Fails | Lc 42.6 | Non-text elements, placeholder text |
| #66C19A text on black | 9.65:1 | AAA | Lc -59.6 | 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
#F0F7F4
oklch(97% 0.008 168.8)
-
Step 100
100
#DFEEE6
oklch(93.6% 0.019 162.9)
-
Step 200
200
#C4E1D3
oklch(88.5% 0.036 164.9)
-
Step 300
300
#99CFB5
oklch(81% 0.067 163.7)
-
Step 400
400 (this color)
#66C19A
oklch(74.4% 0.105 164)
-
Step 500
500
#00A273
oklch(63.1% 0.134 164)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F36
oklch(37.9% 0.081 163.8)
-
Step 950
950
#022F1F
oklch(27.1% 0.056 163.8)
#66C19A 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) | #BEB698 | 0.103 |
| Deuteranopia (no green cones) | #B0AC9C | 0.099 |
| Tritanopia (no blue cones) | #4AC1B6 | 0.042 |
| Achromatopsia (no color) | #B0B0B0 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66C19A
#66C19A
oklch(74.4% 0.105 164)
- #DB91BC
#DB91BC
oklch(74.4% 0.104 344.2)
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 #66C19A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.035
- Dark Sea Green #8FBC8F ΔE 0.041
- Soft Green #6FC276 ΔE 0.048
- Greenblue #23C48B ΔE 0.048
- Pale Teal #82CBB2 ΔE 0.050
- Muted Teal #90B494 ΔE 0.051
- Lichen #8FB67B ΔE 0.052
- Green Blue #01C08D ΔE 0.052
Use #66C19A 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.