#5BDBE9
Closest named color: Aqua Blue (#02D8E9). oklch(82.6% 0.113 205.2), rgb(91, 219, 233).
Aa
Black text reads best on this color (12.75:1).
About this color
#5BDBE9 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.113 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.032 away. Black text reads best on it, at 12.75:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.75:1 |
| White text | 1.64:1 |
Values
| HEX | #5BDBE9 |
| RGB | rgb(91, 219, 233) |
| HSL | hsl(186, 76%, 64%) |
| OKLCH | oklch(82.6% 0.113 205.2) |
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 #5BDBE9 | 1.64:1 | Fails | Lc -32.0 | Non-text elements, placeholder text |
| Black text on #5BDBE9 | 12.75:1 | AAA | Lc 75.4 | Fine for body text |
| #5BDBE9 text on white | 1.64:1 | Fails | Lc 28.4 | Dividers and decoration only |
| #5BDBE9 text on black | 12.75:1 | AAA | Lc -74.5 | 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
#EAF9FA
oklch(97.1% 0.016 201.7)
-
Step 100
100
#D2F1F4
oklch(93.7% 0.033 203.7)
-
Step 200
200
#A8E6ED
oklch(88.5% 0.063 204.8)
-
Step 300
300 (this color)
#5BDBE9
oklch(82.6% 0.113 205.2)
-
Step 400
400
#00B6C4
oklch(70.8% 0.121 204.6)
-
Step 500
500
#009CA9
oklch(63.2% 0.108 205.2)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#5BDBE9 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) | #CBD3EA | 0.112 |
| Deuteranopia (no green cones) | #B5C3E9 | 0.102 |
| Tritanopia (no blue cones) | #00E3DF | 0.040 |
| Achromatopsia (no color) | #CACACA | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BDBE9
#5BDBE9
oklch(82.6% 0.113 205.2)
- #FFADA6
#FFADA6
oklch(82.5% 0.098 24.8)
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 #5BDBE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.032
- Turquoise #40E0D0 ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.048
- Sky Blue #87CEEB ΔE 0.048
- Robin's Egg #6DEDFD ΔE 0.054
- Vivid Sky Blue #4CC9F0 ΔE 0.056
- Light Sky Blue #87CEFA ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.060
Use #5BDBE9 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.