#3961DC
Closest named color: Royal Blue (#4169E1). oklch(53.7% 0.193 266.2), rgb(57, 97, 220).
Aa
White text reads best on this color (5.36:1).
About this color
#3961DC is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.193 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. White text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #3961DC |
| RGB | rgb(57, 97, 220) |
| HSL | hsl(225, 70%, 54%) |
| OKLCH | oklch(53.7% 0.193 266.2) |
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 #3961DC | 5.36:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #3961DC | 3.91:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #3961DC text on white | 5.36:1 | AA | Lc 76.2 | Fine for body text |
| #3961DC text on black | 3.91:1 | AA large text | Lc -25.6 | 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
#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
#A7C0FA
oklch(81% 0.087 266.4)
-
Step 400
400
#789DF7
oklch(70.8% 0.139 266)
-
Step 500
500
#5781F4
oklch(63.1% 0.178 266.3)
-
Step 600
600 (this color)
#3961DC
oklch(53.7% 0.193 266.2)
-
Step 700
700
#3155C5
oklch(49.2% 0.18 266.2)
-
Step 800
800
#29469F
oklch(42.7% 0.149 266.4)
-
Step 900
900
#243C7E
oklch(37.6% 0.116 266)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#3961DC 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) | #0072E0 | 0.045 |
| Deuteranopia (no green cones) | #0063DA | 0.029 |
| Tritanopia (no blue cones) | #007F95 | 0.152 |
| Achromatopsia (no color) | #6B6B6B | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3961DC
#3961DC
oklch(53.7% 0.193 266.2)
- #8A6800
#8A6800
oklch(53.7% 0.11 86)
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 #3961DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Warm Blue #4B57DB ΔE 0.027
- Neon Blue #4361EE ΔE 0.030
- Azul #1D5DEC ΔE 0.034
- Cerulean Blue #056EEE ΔE 0.043
- Bright Blue #0165FC ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.057
- Iris #6258C4 ΔE 0.062
Use #3961DC 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.