#4C78E9
Closest named color: Clear Blue (#247AFD). oklch(60% 0.178 265.4), rgb(76, 120, 233).
Aa
Black text reads best on this color (5.17:1).
About this color
#4C78E9 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.178 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.040 away. Black text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.17:1 |
| White text | 4.06:1 |
Values
| HEX | #4C78E9 |
| RGB | rgb(76, 120, 233) |
| HSL | hsl(223, 78%, 61%) |
| OKLCH | oklch(60% 0.178 265.4) |
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 #4C78E9 | 4.06:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #4C78E9 | 5.17:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #4C78E9 text on white | 4.06:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #4C78E9 text on black | 5.17:1 | AA | Lc -34.2 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#769DF7
oklch(70.6% 0.139 265.3)
-
Step 500
500 (this color)
#4C78E9
oklch(60% 0.178 265.4)
-
Step 600
600
#3B68E2
oklch(55.6% 0.192 265.3)
-
Step 700
700
#2E55C5
oklch(49% 0.181 265.5)
-
Step 800
800
#27479F
oklch(42.8% 0.148 265.4)
-
Step 900
900
#233C7E
oklch(37.6% 0.116 265.5)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#4C78E9 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) | #3A86ED | 0.036 |
| Deuteranopia (no green cones) | #0877E7 | 0.040 |
| Tritanopia (no blue cones) | #0092A5 | 0.145 |
| Achromatopsia (no color) | #7E7E7E | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C78E9
#4C78E9
oklch(60% 0.178 265.4)
- #A17900
#A17900
oklch(59.9% 0.123 85.3)
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 #4C78E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.040
- Cornflower #6A79F7 ΔE 0.041
- Royal Blue #4169E1 ΔE 0.042
- Soft Blue #6488EA ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.059
- Neon Blue #4361EE ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.066
Use #4C78E9 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.