#4778DC
Closest named color: Royal Blue (#4169E1). oklch(59% 0.162 262.8), rgb(71, 120, 220).
Aa
Black text reads best on this color (4.98:1).
About this color
#4778DC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.162 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.041 away. Black text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #4778DC |
| RGB | rgb(71, 120, 220) |
| HSL | hsl(220, 68%, 57%) |
| OKLCH | oklch(59% 0.162 262.8) |
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 #4778DC | 4.21:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #4778DC | 4.98:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #4778DC text on white | 4.21:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #4778DC text on black | 4.98:1 | AA | Lc -32.9 | 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
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F0
oklch(80.9% 0.072 262.9)
-
Step 400
400
#79A0E9
oklch(70.7% 0.116 262.3)
-
Step 500
500
#5886E3
oklch(63.1% 0.149 263)
-
Step 600
600 (this color)
#4778DC
oklch(59% 0.162 262.8)
-
Step 700
700
#305BB5
oklch(49.1% 0.151 262.9)
-
Step 800
800
#284B92
oklch(42.7% 0.124 262.6)
-
Step 900
900
#253F75
oklch(37.7% 0.098 263.2)
-
Step 950
950
#162544
oklch(26.9% 0.061 263.4)
#4778DC 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) | #4683E0 | 0.029 |
| Deuteranopia (no green cones) | #2875DA | 0.027 |
| Tritanopia (no blue cones) | #008F9F | 0.132 |
| Achromatopsia (no color) | #7B7B7B | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4778DC
#4778DC
oklch(59% 0.162 262.8)
- #A07500
#A07500
oklch(59% 0.121 82.8)
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 #4778DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.041
- Windows Blue #3778BF ΔE 0.048
- Clear Blue #247AFD ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.056
- Water Blue #0E87CC ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.058
- Soft Blue #6488EA ΔE 0.058
- Cornflower #6A79F7 ΔE 0.058
Use #4778DC 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.