#4D73BE
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.124 262.7), rgb(77, 115, 190).
Aa
White text reads best on this color (4.65:1).
About this color
#4D73BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.124 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.022 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.51:1 |
| White text | 4.65:1 |
Values
| HEX | #4D73BE |
| RGB | rgb(77, 115, 190) |
| HSL | hsl(220, 47%, 52%) |
| OKLCH | oklch(56.3% 0.124 262.7) |
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 #4D73BE | 4.65:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #4D73BE | 4.51:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #4D73BE text on white | 4.65:1 | AA | Lc 72.1 | Content text, not long reading |
| #4D73BE text on black | 4.51:1 | AA | Lc -29.5 | 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
#AEC1E6
oklch(80.9% 0.056 263.7)
-
Step 400
400
#83A1D9
oklch(70.8% 0.089 262.5)
-
Step 500
500
#6488CF
oklch(63.1% 0.115 263)
-
Step 600
600 (this color)
#4D73BE
oklch(56.3% 0.124 262.7)
-
Step 700
700
#3C5EA2
oklch(49.1% 0.116 262.8)
-
Step 800
800
#324D83
oklch(42.7% 0.096 262.9)
-
Step 900
900
#2C4169
oklch(37.8% 0.074 262.4)
-
Step 950
950
#1A263E
oklch(27% 0.048 263.3)
#4D73BE 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) | #537AC1 | 0.021 |
| Deuteranopia (no green cones) | #4470BC | 0.014 |
| Tritanopia (no blue cones) | #00848F | 0.109 |
| Achromatopsia (no color) | #747474 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D73BE
#4D73BE
oklch(56.3% 0.124 262.7)
- #966E00
#966E00
oklch(56.4% 0.116 83.3)
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 #4D73BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.022
- French Blue #436BAD ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.049
- Cool Blue #4984B8 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.052
- Muted Blue #3B719F ΔE 0.054
Use #4D73BE 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.