#40D2ED
Closest named color: Aqua Blue (#02D8E9). oklch(79.9% 0.125 212.9), rgb(64, 210, 237).
Aa
Black text reads best on this color (11.65:1).
About this color
#40D2ED is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.125 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.023 away. Black text reads best on it, at 11.65:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.65:1 |
| White text | 1.80:1 |
Values
| HEX | #40D2ED |
| RGB | rgb(64, 210, 237) |
| HSL | hsl(189, 83%, 59%) |
| OKLCH | oklch(79.9% 0.125 212.9) |
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 #40D2ED | 1.80:1 | Fails | Lc -37.1 | Non-text elements, placeholder text |
| Black text on #40D2ED | 11.65:1 | AAA | Lc 70.8 | Content text, not long reading |
| #40D2ED text on white | 1.80:1 | Fails | Lc 33.0 | Non-text elements, placeholder text |
| #40D2ED text on black | 11.65:1 | AAA | Lc -69.6 | 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
#EAF9FC
oklch(97.2% 0.016 211)
-
Step 100
100
#D0F1F8
oklch(93.7% 0.036 211.9)
-
Step 200
200
#A4E6F4
oklch(88.5% 0.069 212.3)
-
Step 300
300 (this color)
#40D2ED
oklch(79.9% 0.125 212.9)
-
Step 400
400
#00B4CE
oklch(70.7% 0.124 212.8)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#40D2ED 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) | #BECBEF | 0.115 |
| Deuteranopia (no green cones) | #A6B9ED | 0.104 |
| Tritanopia (no blue cones) | #00DDDA | 0.049 |
| Achromatopsia (no color) | #C1C1C1 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D2ED
#40D2ED
oklch(79.9% 0.125 212.9)
- #FFA18D
#FFA18D
oklch(79.9% 0.116 32.7)
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 #40D2ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.023
- Vivid Sky Blue #4CC9F0 ΔE 0.027
- Bright Sky Blue #02CCFE ΔE 0.037
- Dark Turquoise #00CED1 ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.047
- Sky Blue #87CEEB ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.051
- Light Sky Blue #87CEFA ΔE 0.058
Use #40D2ED 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.