#3F4CB2
Closest named color: Blueberry (#464196). oklch(46.6% 0.161 273), rgb(63, 76, 178).
Aa
White text reads best on this color (7.27:1).
About this color
#3F4CB2 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.161 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.051 away. White text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.88:1 |
| White text | 7.27:1 |
Values
| HEX | #3F4CB2 |
| RGB | rgb(63, 76, 178) |
| HSL | hsl(233, 48%, 47%) |
| OKLCH | oklch(46.6% 0.161 273) |
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 #3F4CB2 | 7.27:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #3F4CB2 | 2.88:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #3F4CB2 text on white | 7.27:1 | AAA | Lc 84.9 | Fine for body text |
| #3F4CB2 text on black | 2.88:1 | Fails | Lc -17.1 | 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
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#B0BEF4
oklch(81% 0.078 273.3)
-
Step 400
400
#879AEE
oklch(70.6% 0.125 273.1)
-
Step 500
500
#6B7FE9
oklch(63.1% 0.16 273)
-
Step 600
600
#5466D7
oklch(55.7% 0.173 272.7)
-
Step 700
700 (this color)
#3F4CB2
oklch(46.6% 0.161 273)
-
Step 800
800
#394597
oklch(42.7% 0.134 273.1)
-
Step 900
900
#303B78
oklch(37.7% 0.104 272.8)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#3F4CB2 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) | #005CB5 | 0.052 |
| Deuteranopia (no green cones) | #0052B0 | 0.045 |
| Tritanopia (no blue cones) | #006577 | 0.136 |
| Achromatopsia (no color) | #575757 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4CB2
#3F4CB2
oklch(46.6% 0.161 273)
- #6C5800
#6C5800
oklch(46.7% 0.096 93.5)
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 #3F4CB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blue Blue #2242C7 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.057
- Blurple #5539CC ΔE 0.062
- Bluey Purple #6241C7 ΔE 0.065
- Sapphire #2138AB ΔE 0.065
- Iris #6258C4 ΔE 0.068
Use #3F4CB2 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.