#536FDF
Closest named color: Royal Blue (#4169E1). oklch(57.9% 0.173 269.7), rgb(83, 111, 223).
Aa
Black text reads best on this color (4.70:1).
About this color
#536FDF is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.173 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.027 away. Black text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #536FDF |
| RGB | rgb(83, 111, 223) |
| HSL | hsl(228, 69%, 60%) |
| OKLCH | oklch(57.9% 0.173 269.7) |
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 #536FDF | 4.46:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #536FDF | 4.70:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #536FDF text on white | 4.46:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #536FDF text on black | 4.70:1 | AA | Lc -31.0 | Non-text elements, placeholder text |
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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CED9F7
oklch(88.6% 0.043 269.5)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#829CEE
oklch(70.7% 0.124 269.7)
-
Step 500
500
#6481E9
oklch(63.1% 0.159 269.7)
-
Step 600
600 (this color)
#536FDF
oklch(57.9% 0.173 269.7)
-
Step 700
700
#3E56BA
oklch(49.1% 0.16 269.5)
-
Step 800
800
#334797
oklch(42.8% 0.133 269.5)
-
Step 900
900
#2C3C78
oklch(37.6% 0.104 269.6)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#536FDF 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) | #307EE3 | 0.044 |
| Deuteranopia (no green cones) | #0171DD | 0.051 |
| Tritanopia (no blue cones) | #00899C | 0.147 |
| Achromatopsia (no color) | #777777 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #536FDF
#536FDF
oklch(57.9% 0.173 269.7)
- #967600
#967600
oklch(58% 0.119 89.7)
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 #536FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.027
- Dark Periwinkle #665FD1 ΔE 0.046
- Neon Blue #4361EE ΔE 0.047
- Cornflower #6A79F7 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.055
- Clear Blue #247AFD ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.060
Use #536FDF 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.