#40CDDD
Closest named color: Dark Turquoise (#00CED1). oklch(78.1% 0.118 206.2), rgb(64, 205, 221).
Aa
Black text reads best on this color (10.99:1).
About this color
#40CDDD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.118 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.026 away. Black text reads best on it, at 10.99:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.99:1 |
| White text | 1.91:1 |
Values
| HEX | #40CDDD |
| RGB | rgb(64, 205, 221) |
| HSL | hsl(186, 70%, 56%) |
| OKLCH | oklch(78.1% 0.118 206.2) |
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 #40CDDD | 1.91:1 | Fails | Lc -40.3 | Non-text elements, placeholder text |
| Black text on #40CDDD | 10.99:1 | AAA | Lc 67.8 | Content text, not long reading |
| #40CDDD text on white | 1.91:1 | Fails | Lc 36.1 | Non-text elements, placeholder text |
| #40CDDD text on black | 10.99:1 | AAA | Lc -66.4 | 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
#EAF9FB
oklch(97.2% 0.016 206.4)
-
Step 100
100
#D1F1F5
oklch(93.6% 0.034 205.8)
-
Step 200
200
#A6E6EF
oklch(88.5% 0.065 206.9)
-
Step 300
300 (this color)
#40CDDD
oklch(78.1% 0.118 206.2)
-
Step 400
400
#00B5C6
oklch(70.6% 0.121 206.7)
-
Step 500
500
#009BAA
oklch(63% 0.108 206.9)
-
Step 600
600
#00838F
oklch(55.7% 0.095 206.1)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#40CDDD 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) | #BCC5DE | 0.116 |
| Deuteranopia (no green cones) | #A6B4DD | 0.107 |
| Tritanopia (no blue cones) | #00D6D2 | 0.037 |
| Achromatopsia (no color) | #BBBBBB | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CDDD
#40CDDD
oklch(78.1% 0.118 206.2)
- #FA9990
#FA9990
oklch(78% 0.118 25.8)
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 #40CDDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.026
- Medium Turquoise #48D1CC ΔE 0.030
- Aqua Blue #02D8E9 ΔE 0.030
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Bright Sky Blue #02CCFE ΔE 0.050
- Sky Blue #87CEEB ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.062
- Turquoise #40E0D0 ΔE 0.062
Use #40CDDD 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.