#40DFBA
Closest named color: Aqua Marine (#2EE8BB). oklch(81.3% 0.14 173.4), rgb(64, 223, 186).
Aa
Black text reads best on this color (12.48:1).
About this color
#40DFBA is a light, vivid teal or cyan. In OKLCH its lightness is 81%, its chroma 0.140 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.025 away. Black text reads best on it, at 12.48:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.48:1 |
| White text | 1.68:1 |
Values
| HEX | #40DFBA |
| RGB | rgb(64, 223, 186) |
| HSL | hsl(166, 71%, 56%) |
| OKLCH | oklch(81.3% 0.14 173.4) |
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 #40DFBA | 1.68:1 | Fails | Lc -33.1 | Non-text elements, placeholder text |
| Black text on #40DFBA | 12.48:1 | AAA | Lc 74.4 | Content text, not long reading |
| #40DFBA text on white | 1.68:1 | Fails | Lc 29.4 | Dividers and decoration only |
| #40DFBA text on black | 12.48:1 | AAA | Lc -73.5 | 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
#CFF3E7
oklch(93.5% 0.041 173.3)
-
Step 200
200
#A3EAD5
oklch(88.4% 0.077 174.1)
-
Step 300
300 (this color)
#40DFBA
oklch(81.3% 0.14 173.4)
-
Step 400
400
#00BB99
oklch(70.6% 0.135 173.4)
-
Step 500
500
#00A183
oklch(63.2% 0.121 173.2)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3E
oklch(37.8% 0.073 172.9)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#40DFBA 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) | #D8D1B8 | 0.145 |
| Deuteranopia (no green cones) | #C2C1BD | 0.139 |
| Tritanopia (no blue cones) | #00E1D4 | 0.035 |
| Achromatopsia (no color) | #C7C7C7 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40DFBA
#40DFBA
oklch(81.3% 0.14 173.4)
- #FFA1C8
#FFA1C8
oklch(81.4% 0.12 353.7)
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 #40DFBA, closest first.
No curated palette has a color within ΔE 0.04 of #40DFBA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.025
- Turquoise #40E0D0 ΔE 0.030
- Emerald #06D6A0 ΔE 0.045
- Seafoam Blue #78D1B6 ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.049
- Medium Turquoise #48D1CC ΔE 0.054
- Aqua Green #12E193 ΔE 0.059
- Light Teal #90E4C1 ΔE 0.063
Use #40DFBA 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.