#5BDAE9
Closest named color: Aqua Blue (#02D8E9). oklch(82.3% 0.113 206), rgb(91, 218, 233).
Aa
Black text reads best on this color (12.65:1).
About this color
#5BDAE9 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.113 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.031 away. Black text reads best on it, at 12.65:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.65:1 |
| White text | 1.66:1 |
Values
| HEX | #5BDAE9 |
| RGB | rgb(91, 218, 233) |
| HSL | hsl(186, 76%, 64%) |
| OKLCH | oklch(82.3% 0.113 206) |
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 #5BDAE9 | 1.66:1 | Fails | Lc -32.5 | Non-text elements, placeholder text |
| Black text on #5BDAE9 | 12.65:1 | AAA | Lc 75.0 | Fine for body text |
| #5BDAE9 text on white | 1.66:1 | Fails | Lc 28.8 | Dividers and decoration only |
| #5BDAE9 text on black | 12.65:1 | AAA | Lc -74.1 | 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
#EBF9FA
oklch(97.2% 0.015 202.1)
-
Step 100
100
#D2F1F5
oklch(93.7% 0.033 206.1)
-
Step 200
200
#A8E6ED
oklch(88.5% 0.063 204.8)
-
Step 300
300 (this color)
#5BDAE9
oklch(82.3% 0.113 206)
-
Step 400
400
#00B5C5
oklch(70.6% 0.121 206)
-
Step 500
500
#009BA9
oklch(63% 0.108 206.1)
-
Step 600
600
#00838F
oklch(55.7% 0.095 206.1)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#5BDAE9 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) | #C9D2EA | 0.110 |
| Deuteranopia (no green cones) | #B4C2E9 | 0.102 |
| Tritanopia (no blue cones) | #00E3DE | 0.043 |
| Achromatopsia (no color) | #C9C9C9 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BDAE9
#5BDAE9
oklch(82.3% 0.113 206)
- #FFACA4
#FFACA4
oklch(82.3% 0.099 25.5)
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 #5BDAE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.031
- Sky Blue #87CEEB ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.047
- Turquoise #40E0D0 ΔE 0.048
- Vivid Sky Blue #4CC9F0 ΔE 0.054
- Robin's Egg #6DEDFD ΔE 0.056
- Light Sky Blue #87CEFA ΔE 0.058
- Dark Turquoise #00CED1 ΔE 0.058
Use #5BDAE9 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.