#40D0BD
Closest named color: Medium Turquoise (#48D1CC). oklch(77.8% 0.123 182.3), rgb(64, 208, 189).
Aa
Black text reads best on this color (10.97:1).
About this color
#40D0BD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.123 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.022 away. Black text reads best on it, at 10.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 10.97:1 |
| White text | 1.91:1 |
Values
| HEX | #40D0BD |
| RGB | rgb(64, 208, 189) |
| HSL | hsl(172, 61%, 53%) |
| OKLCH | oklch(77.8% 0.123 182.3) |
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 #40D0BD | 1.91:1 | Fails | Lc -40.4 | Non-text elements, placeholder text |
| Black text on #40D0BD | 10.97:1 | AAA | Lc 67.7 | Content text, not long reading |
| #40D0BD text on white | 1.91:1 | Fails | Lc 36.1 | Non-text elements, placeholder text |
| #40D0BD text on black | 10.97:1 | AAA | Lc -66.3 | 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
#EAF9F6
oklch(97% 0.016 182.7)
-
Step 100
100
#D1F2EC
oklch(93.6% 0.035 183.4)
-
Step 200
200
#A6E8DD
oklch(88.4% 0.068 183.3)
-
Step 300
300 (this color)
#40D0BD
oklch(77.8% 0.123 182.3)
-
Step 400
400
#00BAA7
oklch(70.8% 0.127 182.2)
-
Step 500
500
#009F8F
oklch(63.1% 0.113 182.5)
-
Step 600
600
#008678
oklch(55.6% 0.1 182.2)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#40D0BD 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) | #C6C4BC | 0.130 |
| Deuteranopia (no green cones) | #B2B5BF | 0.124 |
| Tritanopia (no blue cones) | #00D4CA | 0.021 |
| Achromatopsia (no color) | #BBBBBB | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D0BD
#40D0BD
oklch(77.8% 0.123 182.3)
- #F794B0
#F794B0
oklch(77.7% 0.123 2.1)
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 #40D0BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.022
- Medium Aquamarine #66CDAA ΔE 0.030
- Dark Turquoise #00CED1 ΔE 0.033
- Seafoam Blue #78D1B6 ΔE 0.039
- Turquoise #40E0D0 ΔE 0.046
- Pale Teal #82CBB2 ΔE 0.047
- Emerald #06D6A0 ΔE 0.053
- Aqua Blue #02D8E9 ΔE 0.059
Use #40D0BD 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.