#3F4BAC
Closest named color: Blueberry (#464196). oklch(45.9% 0.154 273.4), rgb(63, 75, 172).
Aa
White text reads best on this color (7.46:1).
About this color
#3F4BAC is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.154 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.042 away. White text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #3F4BAC |
| RGB | rgb(63, 75, 172) |
| HSL | hsl(233, 46%, 46%) |
| OKLCH | oklch(45.9% 0.154 273.4) |
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 #3F4BAC | 7.46:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3F4BAC | 2.81:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #3F4BAC text on white | 7.46:1 | AAA | Lc 85.6 | Fine for body text |
| #3F4BAC text on black | 2.81:1 | Fails | Lc -16.5 | 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 700.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B1BEF2
oklch(81% 0.075 273.7)
-
Step 400
400
#899BEB
oklch(70.8% 0.119 273.4)
-
Step 500
500
#6D80E5
oklch(63.2% 0.152 273.3)
-
Step 600
600
#5666D3
oklch(55.5% 0.167 273.4)
-
Step 700
700 (this color)
#3F4BAC
oklch(45.9% 0.154 273.4)
-
Step 800
800
#3A4694
oklch(42.8% 0.128 273.2)
-
Step 900
900
#313B76
oklch(37.6% 0.101 273.4)
-
Step 950
950
#1D2345
oklch(27% 0.063 273.9)
#3F4BAC 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) | #005AAF | 0.052 |
| Deuteranopia (no green cones) | #0050AA | 0.046 |
| Tritanopia (no blue cones) | #006274 | 0.130 |
| Achromatopsia (no color) | #555555 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4BAC
#3F4BAC
oklch(45.9% 0.154 273.4)
- #6A5600
#6A5600
oklch(46% 0.094 93.2)
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 #3F4BAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.062
- Cobalt #1E488F ΔE 0.062
- Twilight #4E518B ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.062
- Sapphire #2138AB ΔE 0.063
Use #3F4BAC 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.