#5A75C3
Closest named color: Windows Blue (#3778BF). oklch(57.8% 0.124 268), rgb(90, 117, 195).
Aa
Black text reads best on this color (4.76:1).
About this color
#5A75C3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.124 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #5A75C3 |
| RGB | rgb(90, 117, 195) |
| HSL | hsl(225, 47%, 56%) |
| OKLCH | oklch(57.8% 0.124 268) |
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 #5A75C3 | 4.40:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #5A75C3 | 4.76:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #5A75C3 text on white | 4.40:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #5A75C3 text on black | 4.76:1 | AA | Lc -31.3 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E6
oklch(80.9% 0.056 268.2)
-
Step 400
400
#889FD9
oklch(70.7% 0.089 267.5)
-
Step 500
500
#6C86CF
oklch(63.1% 0.114 268.2)
-
Step 600
600 (this color)
#5A75C3
oklch(57.8% 0.124 268)
-
Step 700
700
#445CA2
oklch(49.1% 0.116 267.8)
-
Step 800
800
#384B83
oklch(42.6% 0.096 268)
-
Step 900
900
#303F69
oklch(37.6% 0.075 267.8)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#5A75C3 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) | #557DC6 | 0.021 |
| Deuteranopia (no green cones) | #4974C1 | 0.020 |
| Tritanopia (no blue cones) | #238692 | 0.112 |
| Achromatopsia (no color) | #787878 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A75C3
#5A75C3
oklch(57.8% 0.124 268)
- #977400
#977400
oklch(57.7% 0.118 87.5)
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 #5A75C3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Cool Blue #4984B8 ΔE 0.050
- Steel Blue #4682B4 ΔE 0.051
- French Blue #436BAD ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.055
- Off Blue #5684AE ΔE 0.059
- Water Blue #0E87CC ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.064
Use #5A75C3 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.