#40DDC3
Closest named color: Turquoise (#40E0D0). oklch(81.1% 0.133 179.1), rgb(64, 221, 195).
Aa
Black text reads best on this color (12.34:1).
About this color
#40DDC3 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.133 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.018 away. Black text reads best on it, at 12.34:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.34:1 |
| White text | 1.70:1 |
Values
| HEX | #40DDC3 |
| RGB | rgb(64, 221, 195) |
| HSL | hsl(170, 70%, 56%) |
| OKLCH | oklch(81.1% 0.133 179.1) |
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 #40DDC3 | 1.70:1 | Fails | Lc -33.7 | Non-text elements, placeholder text |
| Black text on #40DDC3 | 12.34:1 | AAA | Lc 73.8 | Content text, not long reading |
| #40DDC3 text on white | 1.70:1 | Fails | Lc 30.0 | Dividers and decoration only |
| #40DDC3 text on black | 12.34:1 | AAA | Lc -72.8 | Content text, not long reading |
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 300.
-
Step 50
50
#EAFAF6
oklch(97.2% 0.018 179.3)
-
Step 100
100
#CFF3EA
oklch(93.6% 0.039 178.6)
-
Step 200
200
#A3EADA
oklch(88.6% 0.074 178.9)
-
Step 300
300 (this color)
#40DDC3
oklch(81.1% 0.133 179.1)
-
Step 400
400
#00BAA2
oklch(70.6% 0.129 179.1)
-
Step 500
500
#00A08B
oklch(63.2% 0.115 179)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#40DDC3 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) | #D4D0C2 | 0.141 |
| Deuteranopia (no green cones) | #BEC0C5 | 0.133 |
| Tritanopia (no blue cones) | #00E1D5 | 0.025 |
| Achromatopsia (no color) | #C6C6C6 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40DDC3
#40DDC3
oklch(81.1% 0.133 179.1)
- #FFA1BF
#FFA1BF
oklch(81.1% 0.117 359.4)
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 #40DDC3, closest first.
No curated palette has a color within ΔE 0.04 of #40DDC3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.018
- Aqua Marine #2EE8BB ΔE 0.036
- Medium Turquoise #48D1CC ΔE 0.040
- Seafoam Blue #78D1B6 ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.047
- Emerald #06D6A0 ΔE 0.053
- Dark Turquoise #00CED1 ΔE 0.056
- Pale Teal #82CBB2 ΔE 0.059
Use #40DDC3 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.