#40D8BD
Closest named color: Turquoise (#40E0D0). oklch(79.7% 0.131 178.1), rgb(64, 216, 189).
Aa
Black text reads best on this color (11.77:1).
About this color
#40D8BD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.131 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.030 away. Black text reads best on it, at 11.77:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 11.77:1 |
| White text | 1.78:1 |
Values
| HEX | #40D8BD |
| RGB | rgb(64, 216, 189) |
| HSL | hsl(169, 66%, 55%) |
| OKLCH | oklch(79.7% 0.131 178.1) |
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 #40D8BD | 1.78:1 | Fails | Lc -36.5 | Non-text elements, placeholder text |
| Black text on #40D8BD | 11.77:1 | AAA | Lc 71.3 | Content text, not long reading |
| #40D8BD text on white | 1.78:1 | Fails | Lc 32.5 | Non-text elements, placeholder text |
| #40D8BD text on black | 11.77:1 | AAA | Lc -70.2 | 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
#EAFAF5
oklch(97.2% 0.018 175.3)
-
Step 100
100
#D0F3EA
oklch(93.7% 0.038 178.2)
-
Step 200
200
#A4E9D9
oklch(88.4% 0.073 178.5)
-
Step 300
300 (this color)
#40D8BD
oklch(79.7% 0.131 178.1)
-
Step 400
400
#00BAA1
oklch(70.6% 0.129 178.5)
-
Step 500
500
#00A08A
oklch(63.2% 0.116 178.3)
-
Step 600
600
#008673
oklch(55.5% 0.102 178.1)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#40D8BD 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) | #CFCBBC | 0.137 |
| Deuteranopia (no green cones) | #BABCBF | 0.130 |
| Tritanopia (no blue cones) | #00DBD0 | 0.026 |
| Achromatopsia (no color) | #C2C2C2 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D8BD
#40D8BD
oklch(79.7% 0.131 178.1)
- #FF99BC
#FF99BC
oklch(79.8% 0.128 358.4)
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 #40D8BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.030
- Medium Turquoise #48D1CC ΔE 0.034
- Medium Aquamarine #66CDAA ΔE 0.035
- Seafoam Blue #78D1B6 ΔE 0.038
- Emerald #06D6A0 ΔE 0.045
- Aqua Marine #2EE8BB ΔE 0.046
- Dark Turquoise #00CED1 ΔE 0.049
- Pale Teal #82CBB2 ΔE 0.052
Use #40D8BD 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.