#4878D9
Closest named color: Royal Blue (#4169E1). oklch(58.8% 0.157 262.7), rgb(72, 120, 217).
Aa
Black text reads best on this color (4.96:1).
About this color
#4878D9 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.157 and its hue 263°. 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 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #4878D9 |
| RGB | rgb(72, 120, 217) |
| HSL | hsl(220, 66%, 57%) |
| OKLCH | oklch(58.8% 0.157 262.7) |
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 #4878D9 | 4.23:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #4878D9 | 4.96:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #4878D9 text on white | 4.23:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #4878D9 text on black | 4.96:1 | AA | Lc -32.8 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A8C1EF
oklch(80.8% 0.071 262.5)
-
Step 400
400
#7AA0E7
oklch(70.7% 0.113 262.3)
-
Step 500
500
#5986E0
oklch(63% 0.145 262.9)
-
Step 600
600 (this color)
#4878D9
oklch(58.8% 0.157 262.7)
-
Step 700
700
#315BB2
oklch(49% 0.146 262.8)
-
Step 800
800
#294B90
oklch(42.6% 0.121 262.7)
-
Step 900
900
#253F73
oklch(37.6% 0.095 262.7)
-
Step 950
950
#162543
oklch(26.8% 0.06 262.9)
#4878D9 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) | #4882DD | 0.026 |
| Deuteranopia (no green cones) | #2E75D7 | 0.024 |
| Tritanopia (no blue cones) | #008E9E | 0.128 |
| Achromatopsia (no color) | #7B7B7B | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4878D9
#4878D9
oklch(58.8% 0.157 262.7)
- #9F7400
#9F7400
oklch(58.7% 0.121 82.6)
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 #4878D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.043
- Windows Blue #3778BF ΔE 0.044
- Water Blue #0E87CC ΔE 0.055
- Clear Blue #247AFD ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.059
- Soft Blue #6488EA ΔE 0.059
- Cornflower #6A79F7 ΔE 0.061
Use #4878D9 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.