#40D4F0
Closest named color: Aqua Blue (#02D8E9). oklch(80.5% 0.126 213.4), rgb(64, 212, 240).
Aa
Black text reads best on this color (11.89:1).
About this color
#40D4F0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.126 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.022 away. Black text reads best on it, at 11.89:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.89:1 |
| White text | 1.76:1 |
Values
| HEX | #40D4F0 |
| RGB | rgb(64, 212, 240) |
| HSL | hsl(190, 85%, 60%) |
| OKLCH | oklch(80.5% 0.126 213.4) |
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 #40D4F0 | 1.76:1 | Fails | Lc -35.9 | Non-text elements, placeholder text |
| Black text on #40D4F0 | 11.89:1 | AAA | Lc 71.9 | Content text, not long reading |
| #40D4F0 text on white | 1.76:1 | Fails | Lc 32.0 | Non-text elements, placeholder text |
| #40D4F0 text on black | 11.89:1 | AAA | Lc -70.7 | 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
#E9F9FC
oklch(97.1% 0.017 210.2)
-
Step 100
100
#CFF1F9
oklch(93.6% 0.037 213.5)
-
Step 200
200
#A3E6F5
oklch(88.5% 0.07 213.1)
-
Step 300
300 (this color)
#40D4F0
oklch(80.5% 0.126 213.4)
-
Step 400
400
#00B4CF
oklch(70.8% 0.124 213.4)
-
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
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#40D4F0 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) | #BFCDF2 | 0.115 |
| Deuteranopia (no green cones) | #A7BBF0 | 0.104 |
| Tritanopia (no blue cones) | #00DFDD | 0.049 |
| Achromatopsia (no color) | #C3C3C3 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D4F0
#40D4F0
oklch(80.5% 0.126 213.4)
- #FFA490
#FFA490
oklch(80.5% 0.113 33.1)
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 #40D4F0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.022
- Vivid Sky Blue #4CC9F0 ΔE 0.030
- Bright Sky Blue #02CCFE ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.050
- Sky Blue #87CEEB ΔE 0.050
- Lightblue #7BC8F6 ΔE 0.052
- Light Sky Blue #87CEFA ΔE 0.057
Use #40D4F0 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.