#4178EC
Closest named color: Clear Blue (#247AFD). oklch(59.8% 0.185 263), rgb(65, 120, 236).
Aa
Black text reads best on this color (5.12:1).
About this color
#4178EC is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.185 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.030 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #4178EC |
| RGB | rgb(65, 120, 236) |
| HSL | hsl(221, 82%, 59%) |
| OKLCH | oklch(59.8% 0.185 263) |
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 #4178EC | 4.09:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #4178EC | 5.12:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #4178EC text on white | 4.09:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #4178EC text on black | 5.12:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500 (this color)
#4178EC
oklch(59.8% 0.185 263)
-
Step 600
600
#2F68E7
oklch(55.6% 0.202 263.2)
-
Step 700
700
#2256C8
oklch(49.1% 0.186 262.9)
-
Step 800
800
#1D47A2
oklch(42.7% 0.155 262.9)
-
Step 900
900
#1D3D81
oklch(37.8% 0.121 263)
-
Step 950
950
#11244B
oklch(26.9% 0.077 262.8)
#4178EC 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) | #3486F0 | 0.035 |
| Deuteranopia (no green cones) | #0076EA | 0.032 |
| Tritanopia (no blue cones) | #0094A7 | 0.147 |
| Achromatopsia (no color) | #7D7D7D | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4178EC
#4178EC
oklch(59.8% 0.185 263)
- #A37700
#A37700
oklch(59.7% 0.123 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 #4178EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.030
- Royal Blue #4169E1 ΔE 0.040
- Cerulean Blue #056EEE ΔE 0.044
- Cornflower #6A79F7 ΔE 0.049
- Neon Blue #4361EE ΔE 0.055
- Soft Blue #6488EA ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.063
Use #4178EC 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.