#5BD9FB
Closest named color: Sky Blue (#87CEEB). oklch(82.8% 0.12 218.8), rgb(91, 217, 251).
Aa
Black text reads best on this color (12.76:1).
About this color
#5BD9FB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.120 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Sky Blue (#87CEEB), ΔE 0.042 away. Black text reads best on it, at 12.76:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Sky Blue (#87CEEB) |
| Black text | 12.76:1 |
| White text | 1.64:1 |
Values
| HEX | #5BD9FB |
| RGB | rgb(91, 217, 251) |
| HSL | hsl(193, 95%, 67%) |
| OKLCH | oklch(82.8% 0.12 218.8) |
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 #5BD9FB | 1.64:1 | Fails | Lc -31.9 | Non-text elements, placeholder text |
| Black text on #5BD9FB | 12.76:1 | AAA | Lc 75.5 | Fine for body text |
| #5BD9FB text on white | 1.64:1 | Fails | Lc 28.3 | Dividers and decoration only |
| #5BD9FB text on black | 12.76:1 | AAA | Lc -74.6 | 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 300.
-
Step 50
50
#EAF8FD
oklch(97% 0.016 221.1)
-
Step 100
100
#D1F0FA
oklch(93.6% 0.035 219.2)
-
Step 200
200
#A8E4F7
oklch(88.4% 0.066 219.4)
-
Step 300
300 (this color)
#5BD9FB
oklch(82.8% 0.12 218.8)
-
Step 400
400
#00B3D6
oklch(70.8% 0.128 218.5)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#5BD9FB 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) | #C3D3FD | 0.102 |
| Deuteranopia (no green cones) | #ADC2FB | 0.093 |
| Tritanopia (no blue cones) | #00E5E4 | 0.060 |
| Achromatopsia (no color) | #CACACA | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BD9FB
#5BD9FB
oklch(82.8% 0.12 218.8)
- #FFB197
#FFB197
oklch(82.9% 0.099 39.2)
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 #5BD9FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky Blue #87CEEB ΔE 0.042
- Aqua Blue #02D8E9 ΔE 0.042
- Light Sky Blue #87CEFA ΔE 0.042
- Vivid Sky Blue #4CC9F0 ΔE 0.046
- Lightblue #7BC8F6 ΔE 0.047
- Sky #82CAFC ΔE 0.048
- Bright Sky Blue #02CCFE ΔE 0.052
- Robin's Egg #6DEDFD ΔE 0.058
Use #5BD9FB 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.