#40E2B9
Closest named color: Aqua Marine (#2EE8BB). oklch(82.1% 0.144 171.7), rgb(64, 226, 185).
Aa
Black text reads best on this color (12.79:1).
About this color
#40E2B9 is a light, vivid teal or cyan. In OKLCH its lightness is 82%, its chroma 0.144 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.016 away. Black text reads best on it, at 12.79:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.79:1 |
| White text | 1.64:1 |
Values
| HEX | #40E2B9 |
| RGB | rgb(64, 226, 185) |
| HSL | hsl(165, 74%, 57%) |
| OKLCH | oklch(82.1% 0.144 171.7) |
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 #40E2B9 | 1.64:1 | Fails | Lc -31.6 | Non-text elements, placeholder text |
| Black text on #40E2B9 | 12.79:1 | AAA | Lc 75.8 | Fine for body text |
| #40E2B9 text on white | 1.64:1 | Fails | Lc 28.0 | Dividers and decoration only |
| #40E2B9 text on black | 12.79:1 | AAA | Lc -74.9 | 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
#E9FAF4
oklch(97.1% 0.02 172.8)
-
Step 100
100
#CFF3E6
oklch(93.5% 0.041 171.6)
-
Step 200
200
#A2EBD3
oklch(88.5% 0.08 171.9)
-
Step 300
300 (this color)
#40E2B9
oklch(82.1% 0.144 171.7)
-
Step 400
400
#00BC96
oklch(70.8% 0.138 171.4)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876C
oklch(55.5% 0.108 172.1)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002E23
oklch(26.8% 0.052 171.9)
#40E2B9 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) | #DBD3B7 | 0.148 |
| Deuteranopia (no green cones) | #C6C3BC | 0.143 |
| Tritanopia (no blue cones) | #00E4D6 | 0.039 |
| Achromatopsia (no color) | #CACACA | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40E2B9
#40E2B9
oklch(82.1% 0.144 171.7)
- #FFA4CD
#FFA4CD
oklch(82.1% 0.118 351.5)
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 #40E2B9, closest first.
No curated palette has a color within ΔE 0.04 of #40E2B9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.016
- Turquoise #40E0D0 ΔE 0.035
- Emerald #06D6A0 ΔE 0.048
- Seafoam Blue #78D1B6 ΔE 0.054
- Aqua Green #12E193 ΔE 0.055
- Medium Aquamarine #66CDAA ΔE 0.056
- Bright Teal #01F9C6 ΔE 0.060
- Light Teal #90E4C1 ΔE 0.060
Use #40E2B9 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.