#5BB2F8
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.9% 0.132 245.3), rgb(91, 178, 248).
Aa
Black text reads best on this color (9.16:1).
About this color
#5BB2F8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.132 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.043 away. Black text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.16:1 |
| White text | 2.29:1 |
Values
| HEX | #5BB2F8 |
| RGB | rgb(91, 178, 248) |
| HSL | hsl(207, 92%, 66%) |
| OKLCH | oklch(73.9% 0.132 245.3) |
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 #5BB2F8 | 2.29:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #5BB2F8 | 9.16:1 | AAA | Lc 59.1 | Large or bold text, headings |
| #5BB2F8 text on white | 2.29:1 | Fails | Lc 44.9 | Non-text elements, placeholder text |
| #5BB2F8 text on black | 9.16:1 | AAA | Lc -57.2 | 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
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C1DDF6
oklch(88.5% 0.046 245.3)
-
Step 300
300
#94C7F3
oklch(81% 0.082 245.1)
-
Step 400
400 (this color)
#5BB2F8
oklch(73.9% 0.132 245.3)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#5BB2F8 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) | #93B4FB | 0.058 |
| Deuteranopia (no green cones) | #7EA4F7 | 0.046 |
| Tritanopia (no blue cones) | #00C3CA | 0.101 |
| Achromatopsia (no color) | #ABABAB | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB2F8
#5BB2F8
oklch(73.9% 0.132 245.3)
- #E39846
#E39846
oklch(74% 0.132 65.4)
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 #5BB2F8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.043
- Carolina Blue #8AB8FE ΔE 0.051
- Vivid Sky Blue #4CC9F0 ΔE 0.067
- Bright Sky Blue #02CCFE ΔE 0.071
- Lightblue #7BC8F6 ΔE 0.071
- Cornflower Blue #6495ED ΔE 0.075
- Sky #82CAFC ΔE 0.078
- Periwinkle Blue #8F99FB ΔE 0.081
Use #5BB2F8 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.