#4B78E0
Closest named color: Royal Blue (#4169E1). oklch(59.4% 0.166 264.3), rgb(75, 120, 224).
Aa
Black text reads best on this color (5.06:1).
About this color
#4B78E0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.166 and its hue 264°. 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 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #4B78E0 |
| RGB | rgb(75, 120, 224) |
| HSL | hsl(222, 71%, 59%) |
| OKLCH | oklch(59.4% 0.166 264.3) |
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 #4B78E0 | 4.14:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #4B78E0 | 5.06:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #4B78E0 text on white | 4.14:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #4B78E0 text on black | 5.06:1 | AA | Lc -33.4 | 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 500.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A6C1F6
oklch(81% 0.081 263.6)
-
Step 400
400
#779EF1
oklch(70.6% 0.13 264.2)
-
Step 500
500 (this color)
#4B78E0
oklch(59.4% 0.166 264.3)
-
Step 600
600
#3C6ADB
oklch(55.5% 0.181 264.5)
-
Step 700
700
#2E58BE
oklch(49.1% 0.167 264.2)
-
Step 800
800
#27499A
oklch(42.8% 0.138 264.2)
-
Step 900
900
#243E7A
oklch(37.8% 0.107 264.3)
-
Step 950
950
#152548
oklch(27.1% 0.069 263.9)
#4B78E0 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) | #4384E4 | 0.031 |
| Deuteranopia (no green cones) | #2476DE | 0.032 |
| Tritanopia (no blue cones) | #0090A1 | 0.136 |
| Achromatopsia (no color) | #7C7C7C | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B78E0
#4B78E0
oklch(59.4% 0.166 264.3)
- #A07700
#A07700
oklch(59.4% 0.122 84.4)
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 #4B78E0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.041
- Clear Blue #247AFD ΔE 0.050
- Cornflower #6A79F7 ΔE 0.051
- Soft Blue #6488EA ΔE 0.054
- Windows Blue #3778BF ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Water Blue #0E87CC ΔE 0.063
Use #4B78E0 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.