#40DDBA
Closest named color: Turquoise (#40E0D0). oklch(80.9% 0.138 174.2), rgb(64, 221, 186).
Aa
Black text reads best on this color (12.26:1).
About this color
#40DDBA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.138 and its hue 174°. 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 12.26:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.26:1 |
| White text | 1.71:1 |
Values
| HEX | #40DDBA |
| RGB | rgb(64, 221, 186) |
| HSL | hsl(167, 70%, 56%) |
| OKLCH | oklch(80.9% 0.138 174.2) |
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 #40DDBA | 1.71:1 | Fails | Lc -34.1 | Non-text elements, placeholder text |
| Black text on #40DDBA | 12.26:1 | AAA | Lc 73.5 | Content text, not long reading |
| #40DDBA text on white | 1.71:1 | Fails | Lc 30.3 | Non-text elements, placeholder text |
| #40DDBA text on black | 12.26:1 | AAA | Lc -72.5 | 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
#EAFAF4
oklch(97.2% 0.019 171.5)
-
Step 100
100
#D0F3E8
oklch(93.6% 0.039 174.5)
-
Step 200
200
#A3EAD5
oklch(88.4% 0.077 174.1)
-
Step 300
300 (this color)
#40DDBA
oklch(80.9% 0.138 174.2)
-
Step 400
400
#00BB9A
oklch(70.7% 0.134 174)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#40DDBA 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) | #D5CFB8 | 0.143 |
| Deuteranopia (no green cones) | #C0BFBD | 0.138 |
| Tritanopia (no blue cones) | #00DFD3 | 0.034 |
| Achromatopsia (no color) | #C6C6C6 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40DDBA
#40DDBA
oklch(80.9% 0.138 174.2)
- #FF9EC6
#FF9EC6
oklch(80.9% 0.124 354)
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 #40DDBA, closest first.
No curated palette has a color within ΔE 0.04 of #40DDBA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.030
- Aqua Marine #2EE8BB ΔE 0.030
- Emerald #06D6A0 ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.044
- Seafoam Blue #78D1B6 ΔE 0.045
- Medium Turquoise #48D1CC ΔE 0.049
- Pale Teal #82CBB2 ΔE 0.060
- Aqua Green #12E193 ΔE 0.061
Use #40DDBA 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.