#5BBEF1
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76.2% 0.118 233.7), rgb(91, 190, 241).
Aa
Black text reads best on this color (10.08:1).
About this color
#5BBEF1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.118 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.031 away. Black text reads best on it, at 10.08:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.08:1 |
| White text | 2.08:1 |
Values
| HEX | #5BBEF1 |
| RGB | rgb(91, 190, 241) |
| HSL | hsl(200, 84%, 65%) |
| OKLCH | oklch(76.2% 0.118 233.7) |
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 #5BBEF1 | 2.08:1 | Fails | Lc -45.0 | Large or bold text, headings |
| Black text on #5BBEF1 | 10.08:1 | AAA | Lc 63.5 | Content text, not long reading |
| #5BBEF1 text on white | 2.08:1 | Fails | Lc 40.5 | Non-text elements, placeholder text |
| #5BBEF1 text on black | 10.08:1 | AAA | Lc -61.8 | 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
#AFE1FE
oklch(88.5% 0.065 233.9)
-
Step 300
300 (this color)
#5BBEF1
oklch(76.2% 0.118 233.7)
-
Step 400
400
#00AEED
oklch(70.7% 0.147 233.5)
-
Step 500
500
#0095CC
oklch(63.1% 0.132 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#5BBEF1 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) | #A5BCF3 | 0.075 |
| Deuteranopia (no green cones) | #91ADF0 | 0.065 |
| Tritanopia (no blue cones) | #00CCCF | 0.080 |
| Achromatopsia (no color) | #B4B4B4 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBEF1
#5BBEF1
oklch(76.2% 0.118 233.7)
- #EC9C67
#EC9C67
oklch(76.2% 0.118 53.6)
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 #5BBEF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.031
- Deep Sky Blue #00BFFF ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.042
- Bright Sky Blue #02CCFE ΔE 0.043
- Carolina Blue #8AB8FE ΔE 0.052
- Sky #82CAFC ΔE 0.052
- Light Sky Blue #87CEFA ΔE 0.063
- Sky Blue #87CEEB ΔE 0.065
Use #5BBEF1 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.