#40D5AA
Closest named color: Emerald (#06D6A0). oklch(78.5% 0.139 169.3), rgb(64, 213, 170).
Aa
Black text reads best on this color (11.31:1).
About this color
#40D5AA is a light, moderately saturated green. In OKLCH its lightness is 78%, its chroma 0.139 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.023 away. Black text reads best on it, at 11.31:1.
| Hue family | Greens |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 11.31:1 |
| White text | 1.85:1 |
Values
| HEX | #40D5AA |
| RGB | rgb(64, 213, 170) |
| HSL | hsl(163, 64%, 54%) |
| OKLCH | oklch(78.5% 0.139 169.3) |
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 #40D5AA | 1.85:1 | Fails | Lc -38.7 | Non-text elements, placeholder text |
| Black text on #40D5AA | 11.31:1 | AAA | Lc 69.3 | Content text, not long reading |
| #40D5AA text on white | 1.85:1 | Fails | Lc 34.6 | Non-text elements, placeholder text |
| #40D5AA text on black | 11.31:1 | AAA | Lc -68.0 | 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
#EAFAF3
oklch(97.1% 0.019 167.9)
-
Step 100
100
#D1F3E5
oklch(93.6% 0.04 168.7)
-
Step 200
200
#A6EAD1
oklch(88.5% 0.077 169.7)
-
Step 300
300 (this color)
#40D5AA
oklch(78.5% 0.139 169.3)
-
Step 400
400
#00BC92
oklch(70.7% 0.141 169.4)
-
Step 500
500
#00A17D
oklch(63% 0.125 169.6)
-
Step 600
600
#008868
oklch(55.7% 0.112 168.9)
-
Step 700
700
#007257
oklch(49.1% 0.098 169.1)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3B
oklch(37.7% 0.075 169.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#40D5AA 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) | #CFC7A8 | 0.141 |
| Deuteranopia (no green cones) | #BBB8AD | 0.136 |
| Tritanopia (no blue cones) | #00D6C9 | 0.043 |
| Achromatopsia (no color) | #BEBEBE | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D5AA
#40D5AA
oklch(78.5% 0.139 169.3)
- #FA92C6
#FA92C6
oklch(78.4% 0.139 349.4)
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 #40D5AA, closest first.
No curated palette has a color within ΔE 0.04 of #40D5AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.023
- Medium Aquamarine #66CDAA ΔE 0.030
- Seafoam Blue #78D1B6 ΔE 0.046
- Aqua Marine #2EE8BB ΔE 0.051
- Turquoise #40E0D0 ΔE 0.053
- Medium Turquoise #48D1CC ΔE 0.054
- Aqua Green #12E193 ΔE 0.055
- Pale Teal #82CBB2 ΔE 0.057
Use #40D5AA 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.