#4BD1EF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(80% 0.121 215.7), rgb(75, 209, 239).
Aa
Black text reads best on this color (11.66:1).
About this color
#4BD1EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.121 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.023 away. Black text reads best on it, at 11.66:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.66:1 |
| White text | 1.80:1 |
Values
| HEX | #4BD1EF |
| RGB | rgb(75, 209, 239) |
| HSL | hsl(191, 84%, 62%) |
| OKLCH | oklch(80% 0.121 215.7) |
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 #4BD1EF | 1.80:1 | Fails | Lc -37.1 | Non-text elements, placeholder text |
| Black text on #4BD1EF | 11.66:1 | AAA | Lc 70.8 | Content text, not long reading |
| #4BD1EF text on white | 1.80:1 | Fails | Lc 33.1 | Non-text elements, placeholder text |
| #4BD1EF text on black | 11.66:1 | AAA | Lc -69.6 | 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
#EAF8FC
oklch(97% 0.016 216.7)
-
Step 100
100
#D1F0F9
oklch(93.6% 0.035 217.1)
-
Step 200
200
#A6E5F5
oklch(88.5% 0.067 215.2)
-
Step 300
300 (this color)
#4BD1EF
oklch(80% 0.121 215.7)
-
Step 400
400
#00B3D2
oklch(70.6% 0.125 216)
-
Step 500
500
#009AB4
oklch(63.2% 0.112 215.3)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#4BD1EF 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) | #BCCBF1 | 0.107 |
| Deuteranopia (no green cones) | #A5BAEF | 0.096 |
| Tritanopia (no blue cones) | #00DCDA | 0.053 |
| Achromatopsia (no color) | #C1C1C1 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4BD1EF
#4BD1EF
oklch(80% 0.121 215.7)
- #FFA289
#FFA289
oklch(80% 0.117 35.8)
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 #4BD1EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.023
- Aqua Blue #02D8E9 ΔE 0.030
- Bright Sky Blue #02CCFE ΔE 0.036
- Lightblue #7BC8F6 ΔE 0.044
- Sky Blue #87CEEB ΔE 0.045
- Light Sky Blue #87CEFA ΔE 0.051
- Sky #82CAFC ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.052
Use #4BD1EF 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.