#40C7EB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.3% 0.123 219.7), rgb(64, 199, 235).
Aa
Black text reads best on this color (10.58:1).
About this color
#40C7EB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.123 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.012 away. Black text reads best on it, at 10.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.58:1 |
| White text | 1.98:1 |
Values
| HEX | #40C7EB |
| RGB | rgb(64, 199, 235) |
| HSL | hsl(193, 81%, 59%) |
| OKLCH | oklch(77.3% 0.123 219.7) |
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 #40C7EB | 1.98:1 | Fails | Lc -42.3 | Non-text elements, placeholder text |
| Black text on #40C7EB | 10.58:1 | AAA | Lc 66.0 | Content text, not long reading |
| #40C7EB text on white | 1.98:1 | Fails | Lc 37.9 | Non-text elements, placeholder text |
| #40C7EB text on black | 10.58:1 | AAA | Lc -64.5 | 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
#EAF8FD
oklch(97% 0.016 221.1)
-
Step 100
100
#D1F0FA
oklch(93.6% 0.035 219.2)
-
Step 200
200
#A6E5F9
oklch(88.6% 0.069 219.5)
-
Step 300
300 (this color)
#40C7EB
oklch(77.3% 0.123 219.7)
-
Step 400
400
#00B2D7
oklch(70.6% 0.128 219.8)
-
Step 500
500
#0099B9
oklch(63.1% 0.115 219.7)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
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)
#40C7EB 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) | #B1C2ED | 0.103 |
| Deuteranopia (no green cones) | #9AB1EB | 0.092 |
| Tritanopia (no blue cones) | #00D3D2 | 0.059 |
| Achromatopsia (no color) | #B8B8B8 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C7EB
#40C7EB
oklch(77.3% 0.123 219.7)
- #F89978
#F89978
oklch(77.3% 0.123 39.9)
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 #40C7EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.012
- Bright Sky Blue #02CCFE ΔE 0.028
- Deep Sky Blue #00BFFF ΔE 0.045
- Lightblue #7BC8F6 ΔE 0.048
- Aqua Blue #02D8E9 ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.052
- Sky #82CAFC ΔE 0.059
- Sky Blue #87CEEB ΔE 0.060
Use #40C7EB 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.