#3F4BB0
Closest named color: Blueberry (#464196). oklch(46.3% 0.16 273.3), rgb(63, 75, 176).
Aa
White text reads best on this color (7.38:1).
About this color
#3F4BB0 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.160 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.047 away. White text reads best on it, at 7.38:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.84:1 |
| White text | 7.38:1 |
Values
| HEX | #3F4BB0 |
| RGB | rgb(63, 75, 176) |
| HSL | hsl(234, 47%, 47%) |
| OKLCH | oklch(46.3% 0.16 273.3) |
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 #3F4BB0 | 7.38:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #3F4BB0 | 2.84:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #3F4BB0 text on white | 7.38:1 | AAA | Lc 85.3 | Fine for body text |
| #3F4BB0 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#B0BEF3
oklch(80.9% 0.077 273.1)
-
Step 400
400
#889AED
oklch(70.6% 0.123 273.6)
-
Step 500
500
#6C7FE8
oklch(63.2% 0.158 273.3)
-
Step 600
600
#5566D6
oklch(55.7% 0.171 273)
-
Step 700
700 (this color)
#3F4BB0
oklch(46.3% 0.16 273.3)
-
Step 800
800
#394596
oklch(42.7% 0.132 273.1)
-
Step 900
900
#313B77
oklch(37.7% 0.102 273.4)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#3F4BB0 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) | #005BB3 | 0.053 |
| Deuteranopia (no green cones) | #0051AE | 0.046 |
| Tritanopia (no blue cones) | #006376 | 0.133 |
| Achromatopsia (no color) | #565656 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4BB0
#3F4BB0
oklch(46.3% 0.16 273.3)
- #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 #3F4BB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Blue Blue #2242C7 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.057
- Sapphire #2138AB ΔE 0.063
- Blurple #5539CC ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.066
- Cobalt #1E488F ΔE 0.067
Use #3F4BB0 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.