#536EA3
Closest named color: Flat Blue (#3C73A8). oklch(54% 0.089 263.1), rgb(83, 110, 163).
Aa
White text reads best on this color (5.08:1).
About this color
#536EA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.089 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.026 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #536EA3 |
| RGB | rgb(83, 110, 163) |
| HSL | hsl(220, 33%, 48%) |
| OKLCH | oklch(54% 0.089 263.1) |
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 #536EA3 | 5.08:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #536EA3 | 4.12:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #536EA3 text on white | 5.08:1 | AA | Lc 75.0 | Fine for body text |
| #536EA3 text on black | 4.12:1 | AA large text | Lc -26.7 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9E8
oklch(88.4% 0.022 263.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400
#8CA1CA
oklch(70.8% 0.065 263.6)
-
Step 500
500
#6F89BC
oklch(63% 0.083 263.4)
-
Step 600
600 (this color)
#536EA3
oklch(54% 0.089 263.1)
-
Step 700
700
#476090
oklch(49.1% 0.083 262.7)
-
Step 800
800
#3B4E75
oklch(42.6% 0.069 263.9)
-
Step 900
900
#32415E
oklch(37.6% 0.054 263)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#536EA3 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) | #5A72A5 | 0.015 |
| Deuteranopia (no green cones) | #516BA2 | 0.009 |
| Tritanopia (no blue cones) | #317981 | 0.080 |
| Achromatopsia (no color) | #6E6E6E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #536EA3
#536EA3
oklch(54% 0.089 263.1)
- #886A2A
#886A2A
oklch(54.1% 0.09 83.5)
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 #536EA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.026
- French Blue #436BAD ΔE 0.027
- Dull Blue #49759C ΔE 0.027
- Muted Blue #3B719F ΔE 0.028
- Metallic Blue #4F738E ΔE 0.041
- Stormy Blue #507B9C ΔE 0.042
- Cerulean #457B9D ΔE 0.043
- Dusky Blue #475F94 ΔE 0.050
Use #536EA3 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.