#5371C4
Closest named color: Windows Blue (#3778BF). oklch(56.6% 0.133 267.1), rgb(83, 113, 196).
Aa
White text reads best on this color (4.63:1).
About this color
#5371C4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.133 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.033 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.52:1 |
| White text | 4.63:1 |
Values
| HEX | #5371C4 |
| RGB | rgb(83, 113, 196) |
| HSL | hsl(224, 49%, 55%) |
| OKLCH | oklch(56.6% 0.133 267.1) |
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 #5371C4 | 4.63:1 | AA | Lc -77.5 | Fine for body text |
| Black text on #5371C4 | 4.52:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #5371C4 text on white | 4.63:1 | AA | Lc 72.0 | Content text, not long reading |
| #5371C4 text on black | 4.52:1 | AA | Lc -29.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AFC0E8
oklch(80.8% 0.06 267)
-
Step 400
400
#869FDD
oklch(70.8% 0.096 267.1)
-
Step 500
500
#6886D4
oklch(63.2% 0.123 267)
-
Step 600
600 (this color)
#5371C4
oklch(56.6% 0.133 267.1)
-
Step 700
700
#415CA6
oklch(49.1% 0.123 266.8)
-
Step 800
800
#364B87
oklch(42.7% 0.103 267.4)
-
Step 900
900
#2E3F6C
oklch(37.6% 0.08 266.9)
-
Step 950
950
#1B253F
oklch(26.9% 0.051 267)
#5371C4 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) | #4D7AC7 | 0.024 |
| Deuteranopia (no green cones) | #3E70C2 | 0.023 |
| Tritanopia (no blue cones) | #008391 | 0.118 |
| Achromatopsia (no color) | #757575 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5371C4
#5371C4
oklch(56.6% 0.133 267.1)
- #937100
#937100
oklch(56.6% 0.116 87.6)
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 #5371C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.033
- French Blue #436BAD ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.053
- Royal Blue #4169E1 ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.059
- Cool Blue #4984B8 ΔE 0.060
Use #5371C4 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.