#40BDE6
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(74.7% 0.122 224.2), rgb(64, 189, 230).
Aa
Black text reads best on this color (9.63:1).
About this color
#40BDE6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.122 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.035 away. Black text reads best on it, at 9.63:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.63:1 |
| White text | 2.17:1 |
Values
| HEX | #40BDE6 |
| RGB | rgb(64, 189, 230) |
| HSL | hsl(195, 77%, 58%) |
| OKLCH | oklch(74.7% 0.122 224.2) |
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 #40BDE6 | 2.17:1 | Fails | Lc -47.2 | Large or bold text, headings |
| Black text on #40BDE6 | 9.63:1 | AAA | Lc 61.5 | Content text, not long reading |
| #40BDE6 text on white | 2.17:1 | Fails | Lc 42.5 | Non-text elements, placeholder text |
| #40BDE6 text on black | 9.63:1 | AAA | Lc -59.7 | 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
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DBEDF5
oklch(93.5% 0.022 226.1)
-
Step 200
200
#BCE0EE
oklch(88.5% 0.042 223.4)
-
Step 300
300
#89CCE5
oklch(80.9% 0.076 223.4)
-
Step 400
400 (this color)
#40BDE6
oklch(74.7% 0.122 224.2)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#40BDE6 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) | #A6B9E8 | 0.095 |
| Deuteranopia (no green cones) | #8FA8E6 | 0.084 |
| Tritanopia (no blue cones) | #00C9CA | 0.064 |
| Achromatopsia (no color) | #B0B0B0 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BDE6
#40BDE6
oklch(74.7% 0.122 224.2)
- #ED936B
#ED936B
oklch(74.8% 0.122 44.4)
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 #40BDE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Deep Sky Blue #00BFFF ΔE 0.037
- Bright Sky Blue #02CCFE ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.061
- Lightblue #7BC8F6 ΔE 0.061
- Dark Turquoise #00CED1 ΔE 0.066
- Sky #82CAFC ΔE 0.073
- Aqua Blue #02D8E9 ΔE 0.074
Use #40BDE6 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.