#5BBEF3
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76.3% 0.12 234.8), rgb(91, 190, 243).
Aa
Black text reads best on this color (10.10:1).
About this color
#5BBEF3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.120 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.032 away. Black text reads best on it, at 10.10:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.10:1 |
| White text | 2.07:1 |
Values
| HEX | #5BBEF3 |
| RGB | rgb(91, 190, 243) |
| HSL | hsl(201, 86%, 65%) |
| OKLCH | oklch(76.3% 0.12 234.8) |
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 #5BBEF3 | 2.07:1 | Fails | Lc -44.9 | Non-text elements, placeholder text |
| Black text on #5BBEF3 | 10.10:1 | AAA | Lc 63.6 | Content text, not long reading |
| #5BBEF3 text on white | 2.07:1 | Fails | Lc 40.4 | Non-text elements, placeholder text |
| #5BBEF3 text on black | 10.10:1 | AAA | Lc -61.9 | 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
#ECF8FF
oklch(97.2% 0.016 233)
-
Step 100
100
#D5EEFE
oklch(93.6% 0.034 235.9)
-
Step 200
200
#AFE1FF
oklch(88.5% 0.066 234.8)
-
Step 300
300 (this color)
#5BBEF3
oklch(76.3% 0.12 234.8)
-
Step 400
400
#00AEEF
oklch(70.8% 0.149 234.4)
-
Step 500
500
#0095CE
oklch(63.2% 0.133 234.7)
-
Step 600
600
#007DAE
oklch(55.7% 0.118 234.9)
-
Step 700
700
#006993
oklch(49.2% 0.104 234.9)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004765
oklch(37.6% 0.08 234.9)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#5BBEF3 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) | #A5BCF6 | 0.075 |
| Deuteranopia (no green cones) | #90ADF2 | 0.064 |
| Tritanopia (no blue cones) | #00CCD0 | 0.081 |
| Achromatopsia (no color) | #B4B4B4 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBEF3
#5BBEF3
oklch(76.3% 0.12 234.8)
- #ED9D65
#ED9D65
oklch(76.4% 0.12 54.9)
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 #5BBEF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.032
- Deep Sky Blue #00BFFF ΔE 0.035
- Lightblue #7BC8F6 ΔE 0.042
- Bright Sky Blue #02CCFE ΔE 0.043
- Carolina Blue #8AB8FE ΔE 0.050
- Sky #82CAFC ΔE 0.051
- Light Sky Blue #87CEFA ΔE 0.063
- Sky Blue #87CEEB ΔE 0.066
Use #5BBEF3 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.