#4BD9FF
Closest named color: Aqua Blue (#02D8E9). oklch(82.5% 0.129 219.5), rgb(75, 217, 255).
Aa
Black text reads best on this color (12.66:1).
About this color
#4BD9FF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.129 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.040 away. Black text reads best on it, at 12.66:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.66:1 |
| White text | 1.65:1 |
Values
| HEX | #4BD9FF |
| RGB | rgb(75, 217, 255) |
| HSL | hsl(193, 100%, 65%) |
| OKLCH | oklch(82.5% 0.129 219.5) |
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 #4BD9FF | 1.65:1 | Fails | Lc -32.3 | Non-text elements, placeholder text |
| Black text on #4BD9FF | 12.66:1 | AAA | Lc 75.2 | Fine for body text |
| #4BD9FF text on white | 1.65:1 | Fails | Lc 28.6 | Dividers and decoration only |
| #4BD9FF text on black | 12.66:1 | AAA | Lc -74.2 | 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
#E9F9FE
oklch(97.2% 0.018 218.4)
-
Step 100
100
#CFF0FB
oklch(93.5% 0.037 219.9)
-
Step 200
200
#A3E5FA
oklch(88.5% 0.072 219.6)
-
Step 300
300 (this color)
#4BD9FF
oklch(82.5% 0.129 219.5)
-
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)
#4BD9FF 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) | #C1D3FF | 0.108 |
| Deuteranopia (no green cones) | #A9C1FF | 0.098 |
| Tritanopia (no blue cones) | #00E6E5 | 0.062 |
| Achromatopsia (no color) | #C9C9C9 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4BD9FF
#4BD9FF
oklch(82.5% 0.129 219.5)
- #FFAF94
#FFAF94
oklch(82.4% 0.102 39.4)
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 #4BD9FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.040
- Vivid Sky Blue #4CC9F0 ΔE 0.044
- Bright Sky Blue #02CCFE ΔE 0.045
- Light Sky Blue #87CEFA ΔE 0.048
- Sky Blue #87CEEB ΔE 0.050
- Lightblue #7BC8F6 ΔE 0.050
- Sky #82CAFC ΔE 0.052
- Robin's Egg #6DEDFD ΔE 0.063
Use #4BD9FF 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.