#5BBDF5
Closest named color: Deep Sky Blue (#00BFFF). oklch(76.2% 0.122 236.5), rgb(91, 189, 245).
Aa
Black text reads best on this color (10.04:1).
About this color
#5BBDF5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.122 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.034 away. Black text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 10.04:1 |
| White text | 2.09:1 |
Values
| HEX | #5BBDF5 |
| RGB | rgb(91, 189, 245) |
| HSL | hsl(202, 89%, 66%) |
| OKLCH | oklch(76.2% 0.122 236.5) |
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 #5BBDF5 | 2.09:1 | Fails | Lc -45.2 | Large or bold text, headings |
| Black text on #5BBDF5 | 10.04:1 | AAA | Lc 63.3 | Content text, not long reading |
| #5BBDF5 text on white | 2.09:1 | Fails | Lc 40.6 | Non-text elements, placeholder text |
| #5BBDF5 text on black | 10.04:1 | AAA | Lc -61.6 | 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
#ECF7FF
oklch(97% 0.016 239.1)
-
Step 100
100
#D5EEFF
oklch(93.6% 0.035 237.5)
-
Step 200
200
#B1E1FF
oklch(88.6% 0.065 235.9)
-
Step 300
300 (this color)
#5BBDF5
oklch(76.2% 0.122 236.5)
-
Step 400
400
#00ADF3
oklch(70.8% 0.153 236.5)
-
Step 500
500
#0094D1
oklch(63.1% 0.137 236.6)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#5BBDF5 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) | #A3BCF8 | 0.073 |
| Deuteranopia (no green cones) | #8DACF4 | 0.061 |
| Tritanopia (no blue cones) | #00CBD0 | 0.084 |
| Achromatopsia (no color) | #B3B3B3 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBDF5
#5BBDF5
oklch(76.2% 0.122 236.5)
- #EC9D61
#EC9D61
oklch(76.2% 0.121 56.9)
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 #5BBDF5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.034
- Vivid Sky Blue #4CC9F0 ΔE 0.036
- Lightblue #7BC8F6 ΔE 0.044
- Bright Sky Blue #02CCFE ΔE 0.045
- Carolina Blue #8AB8FE ΔE 0.048
- Sky #82CAFC ΔE 0.053
- Light Sky Blue #87CEFA ΔE 0.065
- Sky Blue #87CEEB ΔE 0.069
Use #5BBDF5 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.