#40C0EA
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.6% 0.124 224.3), rgb(64, 192, 234).
Aa
Black text reads best on this color (9.94:1).
About this color
#40C0EA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.124 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.027 away. Black text reads best on it, at 9.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.94:1 |
| White text | 2.11:1 |
Values
| HEX | #40C0EA |
| RGB | rgb(64, 192, 234) |
| HSL | hsl(195, 80%, 58%) |
| OKLCH | oklch(75.6% 0.124 224.3) |
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 #40C0EA | 2.11:1 | Fails | Lc -45.6 | Large or bold text, headings |
| Black text on #40C0EA | 9.94:1 | AAA | Lc 63.0 | Content text, not long reading |
| #40C0EA text on white | 2.11:1 | Fails | Lc 41.0 | Non-text elements, placeholder text |
| #40C0EA text on black | 9.94:1 | AAA | Lc -61.3 | 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 400.
-
Step 50
50
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DBEDF5
oklch(93.5% 0.022 226.1)
-
Step 200
200
#BCE0EF
oklch(88.6% 0.043 225)
-
Step 300
300
#88CCE6
oklch(80.9% 0.078 224.1)
-
Step 400
400 (this color)
#40C0EA
oklch(75.6% 0.124 224.3)
-
Step 500
500
#0098BF
oklch(63.2% 0.119 224.4)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#40C0EA 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) | #A8BCEC | 0.095 |
| Deuteranopia (no green cones) | #91ABEA | 0.085 |
| Tritanopia (no blue cones) | #00CDCE | 0.065 |
| Achromatopsia (no color) | #B2B2B2 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C0EA
#40C0EA
oklch(75.6% 0.124 224.3)
- #F1956C
#F1956C
oklch(75.6% 0.124 44.5)
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 #40C0EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.027
- Deep Sky Blue #00BFFF ΔE 0.034
- Bright Sky Blue #02CCFE ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.064
- Sky #82CAFC ΔE 0.066
- Aqua Blue #02D8E9 ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.069
Use #40C0EA 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.