#3A3FA4
Closest named color: Blueberry (#464196). oklch(42.7% 0.16 275.2), rgb(58, 63, 164).
Aa
White text reads best on this color (8.65:1).
About this color
#3A3FA4 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.160 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #3A3FA4 |
| RGB | rgb(58, 63, 164) |
| HSL | hsl(237, 48%, 44%) |
| OKLCH | oklch(42.7% 0.16 275.2) |
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 #3A3FA4 | 8.65:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #3A3FA4 | 2.42:1 | Fails | Lc 14.7 | Not readable |
| #3A3FA4 text on white | 8.65:1 | AAA | Lc 89.2 | Fine for body text |
| #3A3FA4 text on black | 2.42:1 | Fails | Lc -13.0 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFD
oklch(80.9% 0.093 275.4)
-
Step 400
400
#8797FD
oklch(70.8% 0.15 275.2)
-
Step 500
500
#6C79FA
oklch(63.2% 0.19 275.2)
-
Step 600
600
#565DE9
oklch(55.5% 0.208 275.2)
-
Step 700
700
#474CCB
oklch(49.2% 0.193 275)
-
Step 800
800 (this color)
#3A3FA4
oklch(42.7% 0.16 275.2)
-
Step 900
900
#313782
oklch(37.7% 0.125 275.2)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#3A3FA4 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) | #0050A7 | 0.054 |
| Deuteranopia (no green cones) | #0047A2 | 0.046 |
| Tritanopia (no blue cones) | #00586B | 0.133 |
| Achromatopsia (no color) | #4C4C4C | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3FA4
#3A3FA4
oklch(42.7% 0.16 275.2)
- #5E4E00
#5E4E00
oklch(42.8% 0.088 95.4)
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 #3A3FA4, closest first.
No curated palette has a color within ΔE 0.04 of #3A3FA4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Sapphire #2138AB ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.046
- Cobalt #1E488F ΔE 0.051
- Majorelle Blue #3F37C9 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Indigo Blue #3A18B1 ΔE 0.069
Use #3A3FA4 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.