#3F46A8
Closest named color: Blueberry (#464196). oklch(44.7% 0.155 275.1), rgb(63, 70, 168).
Aa
White text reads best on this color (7.91:1).
About this color
#3F46A8 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.155 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.032 away. White text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #3F46A8 |
| RGB | rgb(63, 70, 168) |
| HSL | hsl(236, 45%, 45%) |
| OKLCH | oklch(44.7% 0.155 275.1) |
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 #3F46A8 | 7.91:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3F46A8 | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #3F46A8 text on white | 7.91:1 | AAA | Lc 87.1 | Fine for body text |
| #3F46A8 text on black | 2.65:1 | Fails | Lc -15.0 | 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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#AFBCFC
oklch(80.8% 0.092 275.3)
-
Step 400
400
#8797FA
oklch(70.7% 0.145 275.1)
-
Step 500
500
#6C7AF7
oklch(63.2% 0.185 275)
-
Step 600
600
#575FE6
oklch(55.7% 0.201 275.2)
-
Step 700
700
#474DC8
oklch(49.1% 0.188 275)
-
Step 800
800 (this color)
#3F46A8
oklch(44.7% 0.155 275.1)
-
Step 900
900
#313880
oklch(37.7% 0.12 274.9)
-
Step 950
950
#1C214B
oklch(26.9% 0.077 274.9)
#3F46A8 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) | #0056AB | 0.055 |
| Deuteranopia (no green cones) | #004DA6 | 0.049 |
| Tritanopia (no blue cones) | #005E70 | 0.132 |
| Achromatopsia (no color) | #515151 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F46A8
#3F46A8
oklch(44.7% 0.155 275.1)
- #645300
#645300
oklch(44.6% 0.092 95.3)
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 #3F46A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.052
- Sapphire #2138AB ΔE 0.054
- Cobalt #1E488F ΔE 0.056
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.060
- Twilight #4E518B ΔE 0.064
Use #3F46A8 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.