#4F78E4
Closest named color: Royal Blue (#4169E1). oklch(59.9% 0.17 265.8), rgb(79, 120, 228).
Aa
Black text reads best on this color (5.13:1).
About this color
#4F78E4 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.170 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.043 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #4F78E4 |
| RGB | rgb(79, 120, 228) |
| HSL | hsl(223, 73%, 60%) |
| OKLCH | oklch(59.9% 0.17 265.8) |
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 #4F78E4 | 4.08:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #4F78E4 | 5.13:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #4F78E4 text on white | 4.08:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #4F78E4 text on black | 5.13:1 | AA | Lc -33.9 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F7
oklch(80.9% 0.083 265.6)
-
Step 400
400
#799DF4
oklch(70.7% 0.134 266)
-
Step 500
500 (this color)
#4F78E4
oklch(59.9% 0.17 265.8)
-
Step 600
600
#3F69DE
oklch(55.7% 0.185 265.7)
-
Step 700
700
#3256C0
oklch(49% 0.171 266)
-
Step 800
800
#29479C
oklch(42.7% 0.143 265.9)
-
Step 900
900
#253D7C
oklch(37.8% 0.111 265.7)
-
Step 950
950
#162448
oklch(26.9% 0.07 265.9)
#4F78E4 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) | #4085E8 | 0.034 |
| Deuteranopia (no green cones) | #1F77E2 | 0.037 |
| Tritanopia (no blue cones) | #0091A3 | 0.141 |
| Achromatopsia (no color) | #7E7E7E | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F78E4
#4F78E4
oklch(59.9% 0.17 265.8)
- #A07900
#A07900
oklch(59.8% 0.122 85.9)
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 #4F78E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.043
- Cornflower #6A79F7 ΔE 0.044
- Clear Blue #247AFD ΔE 0.047
- Soft Blue #6488EA ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.058
- Neon Blue #4361EE ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
Use #4F78E4 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.