#40D7B2
Closest named color: Medium Aquamarine (#66CDAA). oklch(79.2% 0.136 172.6), rgb(64, 215, 178).
Aa
Black text reads best on this color (11.58:1).
About this color
#40D7B2 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.136 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.031 away. Black text reads best on it, at 11.58:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 11.58:1 |
| White text | 1.81:1 |
Values
| HEX | #40D7B2 |
| RGB | rgb(64, 215, 178) |
| HSL | hsl(165, 65%, 55%) |
| OKLCH | oklch(79.2% 0.136 172.6) |
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 #40D7B2 | 1.81:1 | Fails | Lc -37.4 | Non-text elements, placeholder text |
| Black text on #40D7B2 | 11.58:1 | AAA | Lc 70.5 | Content text, not long reading |
| #40D7B2 text on white | 1.81:1 | Fails | Lc 33.4 | Non-text elements, placeholder text |
| #40D7B2 text on black | 11.58:1 | AAA | Lc -69.3 | 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
#D0F3E7
oklch(93.6% 0.04 172.7)
-
Step 200
200
#A5EAD4
oklch(88.5% 0.076 172.7)
-
Step 300
300 (this color)
#40D7B2
oklch(79.2% 0.136 172.6)
-
Step 400
400
#00BB98
oklch(70.6% 0.136 172.9)
-
Step 500
500
#00A182
oklch(63.2% 0.122 172.6)
-
Step 600
600
#00876D
oklch(55.6% 0.107 172.9)
-
Step 700
700
#00725B
oklch(49.2% 0.095 172.3)
-
Step 800
800
#005D4A
oklch(42.6% 0.082 172.5)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#40D7B2 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) | #D0C9B0 | 0.140 |
| Deuteranopia (no green cones) | #BCBAB5 | 0.136 |
| Tritanopia (no blue cones) | #00D9CC | 0.036 |
| Achromatopsia (no color) | #C0C0C0 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D7B2
#40D7B2
oklch(79.2% 0.136 172.6)
- #FD95C3
#FD95C3
oklch(79.1% 0.135 352.6)
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 #40D7B2, closest first.
No curated palette has a color within ΔE 0.04 of #40D7B2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.031
- Emerald #06D6A0 ΔE 0.031
- Seafoam Blue #78D1B6 ΔE 0.041
- Turquoise #40E0D0 ΔE 0.043
- Aqua Marine #2EE8BB ΔE 0.045
- Medium Turquoise #48D1CC ΔE 0.046
- Pale Teal #82CBB2 ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.059
Use #40D7B2 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.