#4B78FC
Closest named color: Clear Blue (#247AFD). oklch(61.3% 0.203 266.3), rgb(75, 120, 252).
Aa
Black text reads best on this color (5.39:1).
About this color
#4B78FC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.203 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.027 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #4B78FC |
| RGB | rgb(75, 120, 252) |
| HSL | hsl(225, 97%, 64%) |
| OKLCH | oklch(61.3% 0.203 266.3) |
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 #4B78FC | 3.89:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #4B78FC | 5.39:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #4B78FC text on white | 3.89:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #4B78FC text on black | 5.39:1 | AA | Lc -35.7 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500 (this color)
#4B78FC
oklch(61.3% 0.203 266.3)
-
Step 600
600
#3762F2
oklch(55.6% 0.221 266.3)
-
Step 700
700
#2B50D3
oklch(49.2% 0.206 266.4)
-
Step 800
800
#2443AA
oklch(42.8% 0.169 266.3)
-
Step 900
900
#213A87
oklch(37.8% 0.133 266.4)
-
Step 950
950
#13234F
oklch(27.1% 0.084 265.9)
#4B78FC 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) | #188AFF | 0.048 |
| Deuteranopia (no green cones) | #0079F9 | 0.039 |
| Tritanopia (no blue cones) | #0098AF | 0.163 |
| Achromatopsia (no color) | #818181 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B78FC
#4B78FC
oklch(61.3% 0.203 266.3)
- #A57E00
#A57E00
oklch(61.4% 0.126 86.7)
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 #4B78FC, closest first.
No curated palette has a color within ΔE 0.04 of #4B78FC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.027
- Cornflower #6A79F7 ΔE 0.036
- Royal Blue #4169E1 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.059
- Soft Blue #6488EA ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.060
- Medium Slate Blue #7B68EE ΔE 0.067
Use #4B78FC 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.