#536FBE
Closest named color: Windows Blue (#3778BF). oklch(55.8% 0.127 267.5), rgb(83, 111, 190).
Aa
White text reads best on this color (4.78:1).
About this color
#536FBE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.127 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.034 away. White text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.38:1 |
| White text | 4.78:1 |
Values
| HEX | #536FBE |
| RGB | rgb(83, 111, 190) |
| HSL | hsl(224, 45%, 54%) |
| OKLCH | oklch(55.8% 0.127 267.5) |
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 #536FBE | 4.78:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #536FBE | 4.38:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #536FBE text on white | 4.78:1 | AA | Lc 73.1 | Content text, not long reading |
| #536FBE text on black | 4.38:1 | AA large text | Lc -28.6 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#879FDA
oklch(70.7% 0.091 267)
-
Step 500
500
#6A86D0
oklch(63.1% 0.116 267.3)
-
Step 600
600 (this color)
#536FBE
oklch(55.8% 0.127 267.5)
-
Step 700
700
#435CA3
oklch(49.1% 0.118 267.4)
-
Step 800
800
#374B84
oklch(42.6% 0.098 267.6)
-
Step 900
900
#303F6A
oklch(37.6% 0.076 268.1)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#536FBE 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) | #4D77C1 | 0.021 |
| Deuteranopia (no green cones) | #406EBC | 0.022 |
| Tritanopia (no blue cones) | #0E808D | 0.114 |
| Achromatopsia (no color) | #727272 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #536FBE
#536FBE
oklch(55.8% 0.127 267.5)
- #906F00
#906F00
oklch(55.9% 0.114 87.9)
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 #536FBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.034
- French Blue #436BAD ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.046
- Mid Blue #276AB3 ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.057
- Muted Blue #3B719F ΔE 0.058
- Steel Blue #4682B4 ΔE 0.059
- Cool Blue #4984B8 ΔE 0.061
Use #536FBE 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.