#4F73C3
Closest named color: Windows Blue (#3778BF). oklch(56.7% 0.131 264.4), rgb(79, 115, 195).
Aa
White text reads best on this color (4.59:1).
About this color
#4F73C3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.131 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.026 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #4F73C3 |
| RGB | rgb(79, 115, 195) |
| HSL | hsl(221, 49%, 54%) |
| OKLCH | oklch(56.7% 0.131 264.4) |
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 #4F73C3 | 4.59:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #4F73C3 | 4.57:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #4F73C3 text on white | 4.59:1 | AA | Lc 71.7 | Content text, not long reading |
| #4F73C3 text on black | 4.57:1 | AA | Lc -30.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9EF
oklch(88.4% 0.033 264.4)
-
Step 300
300
#AEC1E8
oklch(81% 0.059 264.6)
-
Step 400
400
#83A0DC
oklch(70.7% 0.094 264.3)
-
Step 500
500
#6487D2
oklch(63% 0.12 264.3)
-
Step 600
600 (this color)
#4F73C3
oklch(56.7% 0.131 264.4)
-
Step 700
700
#3D5DA5
oklch(49.1% 0.121 264.4)
-
Step 800
800
#334C86
oklch(42.7% 0.101 264.9)
-
Step 900
900
#2C406B
oklch(37.7% 0.078 264.1)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#4F73C3 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) | #507BC6 | 0.022 |
| Deuteranopia (no green cones) | #4070C1 | 0.019 |
| Tritanopia (no blue cones) | #008591 | 0.115 |
| Achromatopsia (no color) | #757575 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F73C3
#4F73C3
oklch(56.7% 0.131 264.4)
- #967000
#967000
oklch(56.8% 0.116 84.9)
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 #4F73C3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.026
- French Blue #436BAD ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.053
- Mid Blue #276AB3 ΔE 0.053
- Cool Blue #4984B8 ΔE 0.054
- Nice Blue #107AB0 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.058
Use #4F73C3 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.