#3F3BAB
Closest named color: Blueberry (#464196). oklch(43% 0.173 277.8), rgb(63, 59, 171).
Aa
White text reads best on this color (8.65:1).
About this color
#3F3BAB is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.173 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.039 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #3F3BAB |
| RGB | rgb(63, 59, 171) |
| HSL | hsl(242, 49%, 45%) |
| OKLCH | oklch(43% 0.173 277.8) |
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 #3F3BAB | 8.65:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #3F3BAB | 2.42:1 | Fails | Lc 14.8 | Not readable |
| #3F3BAB text on white | 8.65:1 | AAA | Lc 89.2 | Fine for body text |
| #3F3BAB text on black | 2.42:1 | Fails | Lc -13.1 | Not readable |
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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8B94FF
oklch(70.6% 0.155 278)
-
Step 500
500
#7175FF
oklch(63.1% 0.201 277.7)
-
Step 600
600
#5C57F2
oklch(55.7% 0.225 277.6)
-
Step 700
700
#4D45D3
oklch(49.1% 0.21 277.9)
-
Step 800
800 (this color)
#3F3BAB
oklch(43% 0.173 277.8)
-
Step 900
900
#343487
oklch(37.7% 0.135 277.7)
-
Step 950
950
#1E1F4F
oklch(26.9% 0.086 278)
#3F3BAB 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) | #0050AF | 0.063 |
| Deuteranopia (no green cones) | #0047A9 | 0.055 |
| Tritanopia (no blue cones) | #00586D | 0.145 |
| Achromatopsia (no color) | #4B4B4B | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3BAB
#3F3BAB
oklch(43% 0.173 277.8)
- #5D4F00
#5D4F00
oklch(42.9% 0.088 97.4)
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 #3F3BAB, closest first.
No curated palette has a color within ΔE 0.04 of #3F3BAB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.039
- Sapphire #2138AB ΔE 0.040
- Majorelle Blue #3F37C9 ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.055
- Blue Blue #2242C7 ΔE 0.056
- Indigo Blue #3A18B1 ΔE 0.060
- Blurple #5539CC ΔE 0.062
Use #3F3BAB 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.