#4C78D2
Closest named color: Windows Blue (#3778BF). oklch(58.5% 0.147 263), rgb(76, 120, 210).
Aa
Black text reads best on this color (4.92:1).
About this color
#4C78D2 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.147 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.037 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #4C78D2 |
| RGB | rgb(76, 120, 210) |
| HSL | hsl(220, 60%, 56%) |
| OKLCH | oklch(58.5% 0.147 263) |
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 #4C78D2 | 4.26:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #4C78D2 | 4.92:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #4C78D2 text on white | 4.26:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #4C78D2 text on black | 4.92:1 | AA | Lc -32.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#AAC1EC
oklch(80.8% 0.066 262.8)
-
Step 400
400
#7EA0E3
oklch(70.7% 0.106 263.3)
-
Step 500
500
#5D87DB
oklch(63.1% 0.135 263)
-
Step 600
600 (this color)
#4C78D2
oklch(58.5% 0.147 263)
-
Step 700
700
#365CAD
oklch(49% 0.137 263.3)
-
Step 800
800
#2D4C8C
oklch(42.8% 0.112 263)
-
Step 900
900
#284070
oklch(37.8% 0.088 262.8)
-
Step 950
950
#182642
oklch(27.2% 0.056 263.1)
#4C78D2 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) | #4E81D5 | 0.024 |
| Deuteranopia (no green cones) | #3975D0 | 0.021 |
| Tritanopia (no blue cones) | #008C9B | 0.121 |
| Achromatopsia (no color) | #7A7A7A | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C78D2
#4C78D2
oklch(58.5% 0.147 263)
- #9E7400
#9E7400
oklch(58.5% 0.12 83.2)
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 #4C78D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.037
- Royal Blue #4169E1 ΔE 0.050
- Water Blue #0E87CC ΔE 0.052
- Cool Blue #4984B8 ΔE 0.058
- Steel Blue #4682B4 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.060
- Soft Blue #6488EA ΔE 0.062
- French Blue #436BAD ΔE 0.065
Use #4C78D2 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.