#5BB5FE
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.8% 0.137 245.6), rgb(91, 181, 254).
Aa
Black text reads best on this color (9.48:1).
About this color
#5BB5FE is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.137 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.040 away. Black text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.48:1 |
| White text | 2.21:1 |
Values
| HEX | #5BB5FE |
| RGB | rgb(91, 181, 254) |
| HSL | hsl(207, 99%, 68%) |
| OKLCH | oklch(74.8% 0.137 245.6) |
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 #5BB5FE | 2.21:1 | Fails | Lc -48.1 | Large or bold text, headings |
| Black text on #5BB5FE | 9.48:1 | AAA | Lc 60.6 | Content text, not long reading |
| #5BB5FE text on white | 2.21:1 | Fails | Lc 43.3 | Non-text elements, placeholder text |
| #5BB5FE text on black | 9.48:1 | AAA | Lc -58.8 | 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
#EFF6FD
oklch(97% 0.012 248)
-
Step 100
100
#DDECFA
oklch(93.6% 0.025 246.2)
-
Step 200
200
#C0DDF7
oklch(88.5% 0.047 245.4)
-
Step 300
300
#92C7F5
oklch(80.9% 0.086 245.3)
-
Step 400
400 (this color)
#5BB5FE
oklch(74.8% 0.137 245.6)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#5BB5FE 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) | #95B7FF | 0.059 |
| Deuteranopia (no green cones) | #7EA7FD | 0.046 |
| Tritanopia (no blue cones) | #00C7CF | 0.103 |
| Achromatopsia (no color) | #AEAEAE | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB5FE
#5BB5FE
oklch(74.8% 0.137 245.6)
- #E89A44
#E89A44
oklch(74.9% 0.137 65.3)
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 #5BB5FE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.040
- Carolina Blue #8AB8FE ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Bright Sky Blue #02CCFE ΔE 0.066
- Lightblue #7BC8F6 ΔE 0.066
- Sky #82CAFC ΔE 0.072
- Pastel Blue #A2BFFE ΔE 0.081
- Cornflower Blue #6495ED ΔE 0.083
Use #5BB5FE 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.