#5BB3FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.4% 0.137 246.4), rgb(91, 179, 253).
Aa
Black text reads best on this color (9.31:1).
About this color
#5BB3FD is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, 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 0.042 away. Black text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.31:1 |
| White text | 2.25:1 |
Values
| HEX | #5BB3FD |
| RGB | rgb(91, 179, 253) |
| HSL | hsl(207, 98%, 67%) |
| OKLCH | oklch(74.4% 0.137 246.4) |
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 #5BB3FD | 2.25:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #5BB3FD | 9.31:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #5BB3FD text on white | 2.25:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #5BB3FD text on black | 9.31:1 | AAA | Lc -57.9 | 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
#93C7F5
oklch(81% 0.085 245.8)
-
Step 400
400 (this color)
#5BB3FD
oklch(74.4% 0.137 246.4)
-
Step 500
500
#008FE5
oklch(63.1% 0.163 246.3)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#002846
oklch(26.9% 0.07 246.6)
#5BB3FD 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) | #92B5FF | 0.056 |
| Deuteranopia (no green cones) | #7CA6FC | 0.043 |
| Tritanopia (no blue cones) | #00C5CD | 0.105 |
| Achromatopsia (no color) | #ADADAD | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB3FD
#5BB3FD
oklch(74.4% 0.137 246.4)
- #E59940
#E59940
oklch(74.3% 0.137 66.8)
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 #5BB3FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.042
- Carolina Blue #8AB8FE ΔE 0.049
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Bright Sky Blue #02CCFE ΔE 0.070
- Lightblue #7BC8F6 ΔE 0.070
- Sky #82CAFC ΔE 0.077
- Cornflower Blue #6495ED ΔE 0.078
- Periwinkle Blue #8F99FB ΔE 0.080
Use #5BB3FD 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.