#40CCEC
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.5% 0.124 216.7), rgb(64, 204, 236).
Aa
Black text reads best on this color (11.06:1).
About this color
#40CCEC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.124 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.013 away. Black text reads best on it, at 11.06:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.06:1 |
| White text | 1.89:1 |
Values
| HEX | #40CCEC |
| RGB | rgb(64, 204, 236) |
| HSL | hsl(191, 82%, 59%) |
| OKLCH | oklch(78.5% 0.124 216.7) |
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 #40CCEC | 1.89:1 | Fails | Lc -40.0 | Non-text elements, placeholder text |
| Black text on #40CCEC | 11.06:1 | AAA | Lc 68.2 | Content text, not long reading |
| #40CCEC text on white | 1.89:1 | Fails | Lc 35.7 | Non-text elements, placeholder text |
| #40CCEC text on black | 11.06:1 | AAA | Lc -66.8 | 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
#EAF9FD
oklch(97.2% 0.017 215.5)
-
Step 100
100
#D0F0FA
oklch(93.5% 0.036 218.6)
-
Step 200
200
#A5E5F7
oklch(88.5% 0.069 217.1)
-
Step 300
300 (this color)
#40CCEC
oklch(78.5% 0.124 216.7)
-
Step 400
400
#00B3D3
oklch(70.7% 0.126 216.7)
-
Step 500
500
#0099B5
oklch(63% 0.112 216.9)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#40CCEC 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) | #B7C6EE | 0.109 |
| Deuteranopia (no green cones) | #9FB5EC | 0.097 |
| Tritanopia (no blue cones) | #00D7D6 | 0.053 |
| Achromatopsia (no color) | #BCBCBC | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CCEC
#40CCEC
oklch(78.5% 0.124 216.7)
- #FD9B80
#FD9B80
oklch(78.4% 0.124 36.2)
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 #40CCEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.013
- Bright Sky Blue #02CCFE ΔE 0.029
- Aqua Blue #02D8E9 ΔE 0.036
- Dark Turquoise #00CED1 ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.047
- Medium Turquoise #48D1CC ΔE 0.053
- Sky Blue #87CEEB ΔE 0.054
- Deep Sky Blue #00BFFF ΔE 0.055
Use #40CCEC 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.