#5372CF
Closest named color: Windows Blue (#3778BF). oklch(57.5% 0.147 267.7), rgb(83, 114, 207).
Aa
Black text reads best on this color (4.67:1).
About this color
#5372CF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.147 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.041 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #5372CF |
| RGB | rgb(83, 114, 207) |
| HSL | hsl(225, 56%, 57%) |
| OKLCH | oklch(57.5% 0.147 267.7) |
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 #5372CF | 4.49:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #5372CF | 4.67:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #5372CF text on white | 4.49:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #5372CF text on black | 4.67:1 | AA | Lc -30.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#849EE3
oklch(70.7% 0.106 267.9)
-
Step 500
500
#6684DB
oklch(63% 0.136 268)
-
Step 600
600 (this color)
#5372CF
oklch(57.5% 0.147 267.7)
-
Step 700
700
#3F5AAE
oklch(49.1% 0.137 267.7)
-
Step 800
800
#344A8D
oklch(42.8% 0.114 267.7)
-
Step 900
900
#2D3E70
oklch(37.6% 0.088 267.9)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#5372CF 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) | #477DD3 | 0.029 |
| Deuteranopia (no green cones) | #3472CD | 0.030 |
| Tritanopia (no blue cones) | #008796 | 0.129 |
| Achromatopsia (no color) | #777777 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5372CF
#5372CF
oklch(57.5% 0.147 267.7)
- #967300
#967300
oklch(57.4% 0.117 87.3)
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 #5372CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.041
- Royal Blue #4169E1 ΔE 0.044
- Dark Periwinkle #665FD1 ΔE 0.051
- French Blue #436BAD ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.063
- Light Indigo #6D5ACF ΔE 0.065
- Iris #6258C4 ΔE 0.066
- Mid Blue #276AB3 ΔE 0.066
Use #5372CF 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.