#4178E6
Closest named color: Clear Blue (#247AFD). oklch(59.4% 0.177 262.4), rgb(65, 120, 230).
Aa
Black text reads best on this color (5.05:1).
About this color
#4178E6 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.177 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.038 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #4178E6 |
| RGB | rgb(65, 120, 230) |
| HSL | hsl(220, 77%, 58%) |
| OKLCH | oklch(59.4% 0.177 262.4) |
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 #4178E6 | 4.15:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #4178E6 | 5.05:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #4178E6 text on white | 4.15:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #4178E6 text on black | 5.05:1 | AA | Lc -33.5 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#719FF7
oklch(70.8% 0.139 262.4)
-
Step 500
500 (this color)
#4178E6
oklch(59.4% 0.177 262.4)
-
Step 600
600
#306AE2
oklch(55.6% 0.193 262.5)
-
Step 700
700
#2358C4
oklch(49.2% 0.178 262.3)
-
Step 800
800
#1E489E
oklch(42.6% 0.148 262.4)
-
Step 900
900
#1E3E7E
oklch(37.8% 0.115 262.3)
-
Step 950
950
#12254A
oklch(27.1% 0.073 262.2)
#4178E6 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) | #3B84EA | 0.030 |
| Deuteranopia (no green cones) | #0275E4 | 0.034 |
| Tritanopia (no blue cones) | #0092A4 | 0.141 |
| Achromatopsia (no color) | #7C7C7C | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4178E6
#4178E6
oklch(59.4% 0.177 262.4)
- #A27600
#A27600
oklch(59.4% 0.122 82.4)
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 #4178E6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.038
- Royal Blue #4169E1 ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.046
- Cornflower #6A79F7 ΔE 0.053
- Neon Blue #4361EE ΔE 0.058
- Soft Blue #6488EA ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.060
- Windows Blue #3778BF ΔE 0.062
Use #4178E6 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.