#4EC3FB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.4% 0.131 232.9), rgb(78, 195, 251).
Aa
Black text reads best on this color (10.52:1).
About this color
#4EC3FB is a medium-light, moderately saturated blue. In OKLCH its lightness is 77%, its chroma 0.131 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.026 away. Black text reads best on it, at 10.52:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.52:1 |
| White text | 1.99:1 |
Values
| HEX | #4EC3FB |
| RGB | rgb(78, 195, 251) |
| HSL | hsl(199, 96%, 65%) |
| OKLCH | oklch(77.4% 0.131 232.9) |
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 #4EC3FB | 1.99:1 | Fails | Lc -42.7 | Non-text elements, placeholder text |
| Black text on #4EC3FB | 10.52:1 | AAA | Lc 65.6 | Content text, not long reading |
| #4EC3FB text on white | 1.99:1 | Fails | Lc 38.3 | Non-text elements, placeholder text |
| #4EC3FB text on black | 10.52:1 | AAA | Lc -64.1 | 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
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D3EFFF
oklch(93.7% 0.037 232.8)
-
Step 200
200
#ADE2FF
oklch(88.6% 0.068 232.4)
-
Step 300
300 (this color)
#4EC3FB
oklch(77.4% 0.131 232.9)
-
Step 400
400
#00AEEC
oklch(70.6% 0.146 233.1)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#4EC3FB 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) | #A7C1FE | 0.084 |
| Deuteranopia (no green cones) | #90B0FA | 0.072 |
| Tritanopia (no blue cones) | #00D2D6 | 0.082 |
| Achromatopsia (no color) | #B7B7B7 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4EC3FB
#4EC3FB
oklch(77.4% 0.131 232.9)
- #F69D62
#F69D62
oklch(77.4% 0.13 53.2)
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 #4EC3FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.026
- Deep Sky Blue #00BFFF ΔE 0.030
- Bright Sky Blue #02CCFE ΔE 0.030
- Lightblue #7BC8F6 ΔE 0.040
- Sky #82CAFC ΔE 0.049
- Carolina Blue #8AB8FE ΔE 0.057
- Light Sky Blue #87CEFA ΔE 0.059
- Sky Blue #87CEEB ΔE 0.065
Use #4EC3FB 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.