#5BCBDB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.3% 0.104 208), rgb(91, 203, 219).
Aa
Black text reads best on this color (11.01:1).
About this color
#5BCBDB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.104 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.033 away. Black text reads best on it, at 11.01:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.01:1 |
| White text | 1.90:1 |
Values
| HEX | #5BCBDB |
| RGB | rgb(91, 203, 219) |
| HSL | hsl(188, 64%, 61%) |
| OKLCH | oklch(78.3% 0.104 208) |
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 #5BCBDB | 1.90:1 | Fails | Lc -40.4 | Non-text elements, placeholder text |
| Black text on #5BCBDB | 11.01:1 | AAA | Lc 67.8 | Content text, not long reading |
| #5BCBDB text on white | 1.90:1 | Fails | Lc 36.1 | Non-text elements, placeholder text |
| #5BCBDB text on black | 11.01:1 | AAA | Lc -66.4 | 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
#EBF8FA
oklch(97% 0.014 207.9)
-
Step 100
100
#D4F0F4
oklch(93.6% 0.03 207.1)
-
Step 200
200
#ADE4ED
oklch(88.4% 0.057 208.6)
-
Step 300
300 (this color)
#5BCBDB
oklch(78.3% 0.104 208)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#5BCBDB 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) | #BBC4DC | 0.099 |
| Deuteranopia (no green cones) | #A8B5DB | 0.092 |
| Tritanopia (no blue cones) | #00D3D0 | 0.044 |
| Achromatopsia (no color) | #BCBCBC | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BCBDB
#5BCBDB
oklch(78.3% 0.104 208)
- #F49F93
#F49F93
oklch(78.4% 0.104 28.4)
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 #5BCBDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.033
- Medium Turquoise #48D1CC ΔE 0.034
- Dark Turquoise #00CED1 ΔE 0.038
- Aqua Blue #02D8E9 ΔE 0.041
- Sky Blue #87CEEB ΔE 0.048
- Lightblue #7BC8F6 ΔE 0.052
- Bright Sky Blue #02CCFE ΔE 0.055
- Light Cornflower Blue #98C1D9 ΔE 0.059
Use #5BCBDB 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.