#3F4AB4
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(46.4% 0.166 273.5), rgb(63, 74, 180).
Aa
White text reads best on this color (7.36:1).
About this color
#3F4AB4 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.166 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.048 away. White text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.84:1 |
| White text | 7.36:1 |
Values
| HEX | #3F4AB4 |
| RGB | rgb(63, 74, 180) |
| HSL | hsl(234, 48%, 48%) |
| OKLCH | oklch(46.4% 0.166 273.5) |
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 #3F4AB4 | 7.36:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #3F4AB4 | 2.84:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #3F4AB4 text on white | 7.36:1 | AAA | Lc 85.2 | Fine for body text |
| #3F4AB4 text on black | 2.84:1 | Fails | Lc -16.8 | 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 700.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#CFD8F8
oklch(88.5% 0.045 273)
-
Step 300
300
#B0BEF5
oklch(81% 0.079 273.4)
-
Step 400
400
#879AF1
oklch(70.8% 0.129 273.3)
-
Step 500
500
#6B7EEC
oklch(63.1% 0.165 273.4)
-
Step 600
600
#5564DA
oklch(55.6% 0.179 273.6)
-
Step 700
700 (this color)
#3F4AB4
oklch(46.4% 0.166 273.5)
-
Step 800
800
#394499
oklch(42.7% 0.138 273.5)
-
Step 900
900
#303A7A
oklch(37.6% 0.109 273.4)
-
Step 950
950
#1C2347
oklch(27.1% 0.067 272.9)
#3F4AB4 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) | #005BB8 | 0.054 |
| Deuteranopia (no green cones) | #0051B2 | 0.046 |
| Tritanopia (no blue cones) | #006478 | 0.138 |
| Achromatopsia (no color) | #565656 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4AB4
#3F4AB4
oklch(46.4% 0.166 273.5)
- #6B5700
#6B5700
oklch(46.3% 0.095 93.4)
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 #3F4AB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Blue Blue #2242C7 ΔE 0.049
- Majorelle Blue #3F37C9 ΔE 0.051
- Blueberry #464196 ΔE 0.052
- Blurple #5539CC ΔE 0.057
- Sapphire #2138AB ΔE 0.062
- Bluey Purple #6241C7 ΔE 0.062
- Iris #6258C4 ΔE 0.069
Use #3F4AB4 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.