#4178E2
Closest named color: Royal Blue (#4169E1). oklch(59.1% 0.172 262), rgb(65, 120, 226).
Aa
Black text reads best on this color (5.00:1).
About this color
#4178E2 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.172 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.038 away. Black text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #4178E2 |
| RGB | rgb(65, 120, 226) |
| HSL | hsl(220, 74%, 57%) |
| OKLCH | oklch(59.1% 0.172 262) |
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 #4178E2 | 4.19:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #4178E2 | 5.00:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #4178E2 text on white | 4.19:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #4178E2 text on black | 5.00:1 | AA | Lc -33.1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A6C1F3
oklch(80.8% 0.077 262.6)
-
Step 400
400
#76A0EE
oklch(70.8% 0.124 262.1)
-
Step 500
500
#5286E8
oklch(63.1% 0.158 261.9)
-
Step 600
600 (this color)
#4178E2
oklch(59.1% 0.172 262)
-
Step 700
700
#2A5ABA
oklch(49.1% 0.161 262.2)
-
Step 800
800
#234A96
oklch(42.6% 0.133 262)
-
Step 900
900
#213F78
oklch(37.7% 0.104 261.8)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#4178E2 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) | #3F84E6 | 0.031 |
| Deuteranopia (no green cones) | #1575E0 | 0.030 |
| Tritanopia (no blue cones) | #0091A2 | 0.137 |
| Achromatopsia (no color) | #7C7C7C | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4178E2
#4178E2
oklch(59.1% 0.172 262)
- #A17500
#A17500
oklch(59.1% 0.122 82.2)
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 #4178E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.038
- Clear Blue #247AFD ΔE 0.043
- Cerulean Blue #056EEE ΔE 0.048
- Windows Blue #3778BF ΔE 0.056
- Cornflower #6A79F7 ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.059
- Neon Blue #4361EE ΔE 0.060
- Soft Blue #6488EA ΔE 0.060
Use #4178E2 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.