#4F73BC
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.121 263.2), rgb(79, 115, 188).
Aa
White text reads best on this color (4.65:1).
About this color
#4F73BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.121 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.024 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.51:1 |
| White text | 4.65:1 |
Values
| HEX | #4F73BC |
| RGB | rgb(79, 115, 188) |
| HSL | hsl(220, 45%, 52%) |
| OKLCH | oklch(56.3% 0.121 263.2) |
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 #4F73BC | 4.65:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #4F73BC | 4.51:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #4F73BC text on white | 4.65:1 | AA | Lc 72.2 | Content text, not long reading |
| #4F73BC 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AEC1E5
oklch(80.9% 0.055 263.2)
-
Step 400
400
#84A1D7
oklch(70.8% 0.086 262.5)
-
Step 500
500
#6688CD
oklch(63.1% 0.111 263.5)
-
Step 600
600 (this color)
#4F73BC
oklch(56.3% 0.121 263.2)
-
Step 700
700
#3E5EA0
oklch(49% 0.113 263.3)
-
Step 800
800
#334D82
oklch(42.6% 0.094 263.2)
-
Step 900
900
#2D4168
oklch(37.8% 0.072 262.8)
-
Step 950
950
#1A263D
oklch(27% 0.046 262.7)
#4F73BC 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) | #547ABF | 0.021 |
| Deuteranopia (no green cones) | #4670BA | 0.014 |
| Tritanopia (no blue cones) | #00838E | 0.107 |
| Achromatopsia (no color) | #747474 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F73BC
#4F73BC
oklch(56.3% 0.121 263.2)
- #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 #4F73BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.024
- French Blue #436BAD ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.047
- Cool Blue #4984B8 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.052
- Muted Blue #3B719F ΔE 0.052
Use #4F73BC 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.