#5BC5EF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.7% 0.114 227.1), rgb(91, 197, 239).
Aa
Black text reads best on this color (10.67:1).
About this color
#5BC5EF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.114 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.013 away. Black text reads best on it, at 10.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.67:1 |
| White text | 1.96:1 |
Values
| HEX | #5BC5EF |
| RGB | rgb(91, 197, 239) |
| HSL | hsl(197, 82%, 65%) |
| OKLCH | oklch(77.7% 0.114 227.1) |
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 #5BC5EF | 1.96:1 | Fails | Lc -42.0 | Non-text elements, placeholder text |
| Black text on #5BC5EF | 10.67:1 | AAA | Lc 66.3 | Content text, not long reading |
| #5BC5EF text on white | 1.96:1 | Fails | Lc 37.6 | Non-text elements, placeholder text |
| #5BC5EF text on black | 10.67:1 | AAA | Lc -64.8 | 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
#EBF8FE
oklch(97.1% 0.016 227)
-
Step 100
100
#D4EFFB
oklch(93.6% 0.033 226.3)
-
Step 200
200
#ADE2FA
oklch(88.4% 0.064 227.5)
-
Step 300
300 (this color)
#5BC5EF
oklch(77.7% 0.114 227.1)
-
Step 400
400
#00B0E2
oklch(70.6% 0.137 227.2)
-
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)
#5BC5EF 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) | #AFC2F1 | 0.085 |
| Deuteranopia (no green cones) | #9AB2EE | 0.074 |
| Tritanopia (no blue cones) | #00D1D3 | 0.069 |
| Achromatopsia (no color) | #B9B9B9 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BC5EF
#5BC5EF
oklch(77.7% 0.114 227.1)
- #F29F76
#F29F76
oklch(77.6% 0.114 46.9)
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 #5BC5EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.013
- Lightblue #7BC8F6 ΔE 0.031
- Bright Sky Blue #02CCFE ΔE 0.035
- Sky #82CAFC ΔE 0.043
- Deep Sky Blue #00BFFF ΔE 0.046
- Sky Blue #87CEEB ΔE 0.049
- Light Sky Blue #87CEFA ΔE 0.050
- Aqua Blue #02D8E9 ΔE 0.060
Use #5BC5EF 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.