#4E78C7
Closest named color: Windows Blue (#3778BF). oklch(58% 0.131 262), rgb(78, 120, 199).
Aa
Black text reads best on this color (4.83:1).
About this color
#4E78C7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.131 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.026 away. Black text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #4E78C7 |
| RGB | rgb(78, 120, 199) |
| HSL | hsl(219, 52%, 54%) |
| OKLCH | oklch(58% 0.131 262) |
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 #4E78C7 | 4.34:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #4E78C7 | 4.83:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #4E78C7 text on white | 4.34:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #4E78C7 text on black | 4.83:1 | AA | Lc -31.8 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ACC1E7
oklch(80.8% 0.059 262.3)
-
Step 400
400
#80A1DC
oklch(70.7% 0.094 261.7)
-
Step 500
500
#6188D2
oklch(63.1% 0.12 262.3)
-
Step 600
600 (this color)
#4E78C7
oklch(58% 0.131 262)
-
Step 700
700
#395EA5
oklch(49.1% 0.122 262.1)
-
Step 800
800
#2F4D86
oklch(42.7% 0.101 262)
-
Step 900
900
#2A416B
oklch(37.8% 0.078 261.6)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#4E78C7 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) | #567FCA | 0.022 |
| Deuteranopia (no green cones) | #4574C5 | 0.016 |
| Tritanopia (no blue cones) | #008A96 | 0.112 |
| Achromatopsia (no color) | #797979 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E78C7
#4E78C7
oklch(58% 0.131 262)
- #9D7200
#9D7200
oklch(58% 0.119 82.2)
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 #4E78C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.026
- Cool Blue #4984B8 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.046
- Water Blue #0E87CC ΔE 0.050
- French Blue #436BAD ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.054
- Nice Blue #107AB0 ΔE 0.058
- Off Blue #5684AE ΔE 0.058
Use #4E78C7 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.