#5BBDE4
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.5% 0.107 226.9), rgb(91, 189, 228).
Aa
Black text reads best on this color (9.84:1).
About this color
#5BBDE4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.107 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.032 away. Black text reads best on it, at 9.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.84:1 |
| White text | 2.13:1 |
Values
| HEX | #5BBDE4 |
| RGB | rgb(91, 189, 228) |
| HSL | hsl(197, 72%, 63%) |
| OKLCH | oklch(75.5% 0.107 226.9) |
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 #5BBDE4 | 2.13:1 | Fails | Lc -46.3 | Large or bold text, headings |
| Black text on #5BBDE4 | 9.84:1 | AAA | Lc 62.3 | Content text, not long reading |
| #5BBDE4 text on white | 2.13:1 | Fails | Lc 41.6 | Non-text elements, placeholder text |
| #5BBDE4 text on black | 9.84:1 | AAA | Lc -60.6 | 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 400.
-
Step 50
50
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DDEDF4
oklch(93.6% 0.019 225.7)
-
Step 200
200
#C0DFEC
oklch(88.5% 0.037 225)
-
Step 300
300
#92CAE2
oklch(80.9% 0.067 226.4)
-
Step 400
400 (this color)
#5BBDE4
oklch(75.5% 0.107 226.9)
-
Step 500
500
#0097C2
oklch(63.1% 0.122 226.9)
-
Step 600
600
#007FA4
oklch(55.6% 0.108 227.1)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#5BBDE4 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) | #A8BAE6 | 0.080 |
| Deuteranopia (no green cones) | #95ABE4 | 0.071 |
| Tritanopia (no blue cones) | #00C8CA | 0.066 |
| Achromatopsia (no color) | #B1B1B1 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBDE4
#5BBDE4
oklch(75.5% 0.107 226.9)
- #E89A73
#E89A73
oklch(75.5% 0.108 47.2)
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 #5BBDE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.032
- Deep Sky Blue #00BFFF ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.049
- Bright Sky Blue #02CCFE ΔE 0.051
- Sky #82CAFC ΔE 0.061
- Light Cornflower Blue #98C1D9 ΔE 0.063
- Carolina Blue #8AB8FE ΔE 0.064
- Sky Blue #87CEEB ΔE 0.065
Use #5BBDE4 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.