#5BAFFF
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.6% 0.142 249.3), rgb(91, 175, 255).
Aa
Black text reads best on this color (9.02:1).
About this color
#5BAFFF is a medium-light, vivid blue. In OKLCH its lightness is 74%, its chroma 0.142 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.051 away. Black text reads best on it, at 9.02:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.02:1 |
| White text | 2.32:1 |
Values
| HEX | #5BAFFF |
| RGB | rgb(91, 175, 255) |
| HSL | hsl(209, 100%, 68%) |
| OKLCH | oklch(73.6% 0.142 249.3) |
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 #5BAFFF | 2.32:1 | Fails | Lc -50.5 | Large or bold text, headings |
| Black text on #5BAFFF | 9.02:1 | AAA | Lc 58.3 | Large or bold text, headings |
| #5BAFFF text on white | 2.32:1 | Fails | Lc 45.6 | Large or bold text, headings |
| #5BAFFF text on black | 9.02:1 | AAA | Lc -56.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DDECFB
oklch(93.6% 0.026 248.1)
-
Step 200
200
#C1DDF9
oklch(88.6% 0.049 248.4)
-
Step 300
300
#94C6F8
oklch(81% 0.088 249)
-
Step 400
400 (this color)
#5BAFFF
oklch(73.6% 0.142 249.3)
-
Step 500
500
#008DEE
oklch(63.2% 0.176 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#002849
oklch(27.1% 0.074 248.8)
#5BAFFF 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) | #8CB3FF | 0.051 |
| Deuteranopia (no green cones) | #75A3FD | 0.036 |
| Tritanopia (no blue cones) | #00C2CC | 0.110 |
| Achromatopsia (no color) | #AAAAAA | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BAFFF
#5BAFFF
oklch(73.6% 0.142 249.3)
- #E29732
#E29732
oklch(73.5% 0.142 69.4)
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 #5BAFFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.051
- Carolina Blue #8AB8FE ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.068
- Periwinkle Blue #8F99FB ΔE 0.073
- Chefchaouen Blue #4895EF ΔE 0.074
- Vivid Sky Blue #4CC9F0 ΔE 0.080
- Bright Sky Blue #02CCFE ΔE 0.081
- Lightblue #7BC8F6 ΔE 0.082
Use #5BAFFF 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.