#5DAFFB
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.5% 0.137 248.6), rgb(93, 175, 251).
Aa
Black text reads best on this color (8.99:1).
About this color
#5DAFFB is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.137 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.050 away. Black text reads best on it, at 8.99:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.99:1 |
| White text | 2.33:1 |
Values
| HEX | #5DAFFB |
| RGB | rgb(93, 175, 251) |
| HSL | hsl(209, 95%, 67%) |
| OKLCH | oklch(73.5% 0.137 248.6) |
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 #5DAFFB | 2.33:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #5DAFFB | 8.99:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #5DAFFB text on white | 2.33:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #5DAFFB text on black | 8.99:1 | AAA | Lc -56.3 | 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
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C1DDF8
oklch(88.6% 0.048 247.4)
-
Step 300
300
#95C6F6
oklch(80.9% 0.086 248.4)
-
Step 400
400 (this color)
#5DAFFB
oklch(73.5% 0.137 248.6)
-
Step 500
500
#008DEB
oklch(63% 0.172 248.6)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#012848
oklch(27.1% 0.073 248.6)
#5DAFFB 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) | #8EB2FE | 0.052 |
| Deuteranopia (no green cones) | #78A3FA | 0.038 |
| Tritanopia (no blue cones) | #00C1CA | 0.107 |
| Achromatopsia (no color) | #AAAAAA | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5DAFFB
#5DAFFB
oklch(73.5% 0.137 248.6)
- #E1973A
#E1973A
oklch(73.4% 0.137 68.3)
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 #5DAFFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.050
- Carolina Blue #8AB8FE ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.068
- Periwinkle Blue #8F99FB ΔE 0.073
- Chefchaouen Blue #4895EF ΔE 0.075
- Vivid Sky Blue #4CC9F0 ΔE 0.077
- Lightblue #7BC8F6 ΔE 0.079
- Bright Sky Blue #02CCFE ΔE 0.080
Use #5DAFFB 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.