#3F71D4
Closest named color: Royal Blue (#4169E1). oklch(56.6% 0.162 262.3), rgb(63, 113, 212).
Aa
White text reads best on this color (4.64:1).
About this color
#3F71D4 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.162 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.030 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.52:1 |
| White text | 4.64:1 |
Values
| HEX | #3F71D4 |
| RGB | rgb(63, 113, 212) |
| HSL | hsl(220, 63%, 54%) |
| OKLCH | oklch(56.6% 0.162 262.3) |
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 #3F71D4 | 4.64:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #3F71D4 | 4.52:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #3F71D4 text on white | 4.64:1 | AA | Lc 71.9 | Content text, not long reading |
| #3F71D4 text on black | 4.52:1 | AA | Lc -29.8 | Dividers and decoration only |
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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F0
oklch(80.8% 0.073 262.2)
-
Step 400
400
#79A0E9
oklch(70.7% 0.116 262.3)
-
Step 500
500
#5786E3
oklch(63.1% 0.15 262.7)
-
Step 600
600 (this color)
#3F71D4
oklch(56.6% 0.162 262.3)
-
Step 700
700
#2F5BB5
oklch(49.1% 0.151 262.6)
-
Step 800
800
#274B92
oklch(42.7% 0.124 262.2)
-
Step 900
900
#243F75
oklch(37.7% 0.098 262.6)
-
Step 950
950
#152544
oklch(26.8% 0.062 262.4)
#3F71D4 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) | #3D7CD8 | 0.029 |
| Deuteranopia (no green cones) | #1A6ED2 | 0.028 |
| Tritanopia (no blue cones) | #008898 | 0.130 |
| Achromatopsia (no color) | #747474 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F71D4
#3F71D4
oklch(56.6% 0.162 262.3)
- #986E00
#986E00
oklch(56.6% 0.117 82)
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 #3F71D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.030
- Windows Blue #3778BF ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.050
- Neon Blue #4361EE ΔE 0.058
- Mid Blue #276AB3 ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.059
- French Blue #436BAD ΔE 0.060
- Clear Blue #247AFD ΔE 0.064
Use #3F71D4 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.