#40DBF0
Closest named color: Aqua Blue (#02D8E9). oklch(82.1% 0.127 208.4), rgb(64, 219, 240).
Aa
Black text reads best on this color (12.60:1).
About this color
#40DBF0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.127 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.021 away. Black text reads best on it, at 12.60:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.60:1 |
| White text | 1.66:1 |
Values
| HEX | #40DBF0 |
| RGB | rgb(64, 219, 240) |
| HSL | hsl(187, 85%, 60%) |
| OKLCH | oklch(82.1% 0.127 208.4) |
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 #40DBF0 | 1.66:1 | Fails | Lc -32.5 | Non-text elements, placeholder text |
| Black text on #40DBF0 | 12.60:1 | AAA | Lc 75.0 | Content text, not long reading |
| #40DBF0 text on white | 1.66:1 | Fails | Lc 28.8 | Dividers and decoration only |
| #40DBF0 text on black | 12.60:1 | AAA | Lc -74.0 | 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
#E9F9FB
oklch(97.1% 0.017 205.8)
-
Step 100
100
#CFF1F7
oklch(93.6% 0.036 209.4)
-
Step 200
200
#A1E7F2
oklch(88.5% 0.071 208.2)
-
Step 300
300 (this color)
#40DBF0
oklch(82.1% 0.127 208.4)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C32
oklch(26.8% 0.046 208.8)
#40DBF0 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) | #C8D3F1 | 0.122 |
| Deuteranopia (no green cones) | #AFC1F0 | 0.111 |
| Tritanopia (no blue cones) | #00E5E1 | 0.042 |
| Achromatopsia (no color) | #C8C8C8 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40DBF0
#40DBF0
oklch(82.1% 0.127 208.4)
- #FFACA0
#FFACA0
oklch(82.2% 0.1 28.5)
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 #40DBF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.021
- Vivid Sky Blue #4CC9F0 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.051
- Turquoise #40E0D0 ΔE 0.052
- Bright Sky Blue #02CCFE ΔE 0.055
- Sky Blue #87CEEB ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.056
- Robin's Egg #6DEDFD ΔE 0.060
Use #40DBF0 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.