#40BCDD
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(74.1% 0.116 219.4), rgb(64, 188, 221).
Aa
Black text reads best on this color (9.45:1).
About this color
#40BCDD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.116 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.042 away. Black text reads best on it, at 9.45:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.45:1 |
| White text | 2.22:1 |
Values
| HEX | #40BCDD |
| RGB | rgb(64, 188, 221) |
| HSL | hsl(193, 70%, 56%) |
| OKLCH | oklch(74.1% 0.116 219.4) |
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 #40BCDD | 2.22:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #40BCDD | 9.45:1 | AAA | Lc 60.6 | Content text, not long reading |
| #40BCDD text on white | 2.22:1 | Fails | Lc 43.4 | Non-text elements, placeholder text |
| #40BCDD text on black | 9.45:1 | AAA | Lc -58.8 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DBEEF4
oklch(93.7% 0.022 218.6)
-
Step 200
200
#BDE0EB
oklch(88.5% 0.04 218.8)
-
Step 300
300
#8ACCE1
oklch(80.8% 0.073 219.9)
-
Step 400
400 (this color)
#40BCDD
oklch(74.1% 0.116 219.4)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00809B
oklch(55.5% 0.101 219.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#40BCDD 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) | #A8B7DF | 0.098 |
| Deuteranopia (no green cones) | #92A7DD | 0.088 |
| Tritanopia (no blue cones) | #00C7C6 | 0.056 |
| Achromatopsia (no color) | #AEAEAE | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BCDD
#40BCDD
oklch(74.1% 0.116 219.4)
- #E99173
#E99173
oklch(74.1% 0.115 39.6)
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 #40BCDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.049
- Turquoise Blue #06B1C4 ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.069
- Medium Turquoise #48D1CC ΔE 0.072
- Topaz #13BBAF ΔE 0.073
Use #40BCDD 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.