#4B73BD
Closest named color: Windows Blue (#3778BF). oklch(56.1% 0.124 261.7), rgb(75, 115, 189).
Aa
White text reads best on this color (4.68:1).
About this color
#4B73BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.124 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.021 away. White text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #4B73BD |
| RGB | rgb(75, 115, 189) |
| HSL | hsl(219, 46%, 52%) |
| OKLCH | oklch(56.1% 0.124 261.7) |
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 #4B73BD | 4.68:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #4B73BD | 4.48:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #4B73BD text on white | 4.68:1 | AA | Lc 72.3 | Content text, not long reading |
| #4B73BD text on black | 4.48:1 | AA large text | Lc -29.4 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC1E5
oklch(80.8% 0.056 262.2)
-
Step 400
400
#82A1D9
oklch(70.7% 0.09 261.9)
-
Step 500
500
#6389CE
oklch(63.2% 0.113 261.7)
-
Step 600
600 (this color)
#4B73BD
oklch(56.1% 0.124 261.7)
-
Step 700
700
#3B5FA1
oklch(49.2% 0.114 261.5)
-
Step 800
800
#314E83
oklch(42.8% 0.095 261.6)
-
Step 900
900
#2B4169
oklch(37.7% 0.074 261.6)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#4B73BD 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) | #537AC0 | 0.022 |
| Deuteranopia (no green cones) | #446FBB | 0.014 |
| Tritanopia (no blue cones) | #00848F | 0.107 |
| Achromatopsia (no color) | #747474 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B73BD
#4B73BD
oklch(56.1% 0.124 261.7)
- #976D00
#976D00
oklch(56.3% 0.116 81.8)
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 #4B73BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.021
- French Blue #436BAD ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.038
- Mid Blue #276AB3 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.048
- Nice Blue #107AB0 ΔE 0.049
- Cool Blue #4984B8 ΔE 0.050
- Muted Blue #3B719F ΔE 0.051
Use #4B73BD 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.