#3B40A2
Closest named color: Blueberry (#464196). oklch(42.8% 0.156 275.4), rgb(59, 64, 162).
Aa
White text reads best on this color (8.60:1).
About this color
#3B40A2 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.156 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.026 away. White text reads best on it, at 8.60:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.44:1 |
| White text | 8.60:1 |
Values
| HEX | #3B40A2 |
| RGB | rgb(59, 64, 162) |
| HSL | hsl(237, 47%, 43%) |
| OKLCH | oklch(42.8% 0.156 275.4) |
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 #3B40A2 | 8.60:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #3B40A2 | 2.44:1 | Fails | Lc 14.9 | Not readable |
| #3B40A2 text on white | 8.60:1 | AAA | Lc 89.1 | Fine for body text |
| #3B40A2 text on black | 2.44:1 | 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
#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
#B0BCFC
oklch(80.9% 0.092 275.9)
-
Step 400
400
#8897FA
oklch(70.7% 0.145 275.5)
-
Step 500
500
#6D79F7
oklch(63% 0.186 275.6)
-
Step 600
600
#575EE6
oklch(55.5% 0.202 275.4)
-
Step 700
700
#484DC8
oklch(49.2% 0.187 275.3)
-
Step 800
800 (this color)
#3B40A2
oklch(42.8% 0.156 275.4)
-
Step 900
900
#323780
oklch(37.6% 0.121 275.9)
-
Step 950
950
#1D214B
oklch(27% 0.077 275.9)
#3B40A2 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) | #0050A5 | 0.054 |
| Deuteranopia (no green cones) | #0047A0 | 0.047 |
| Tritanopia (no blue cones) | #00586A | 0.131 |
| Achromatopsia (no color) | #4C4C4C | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B40A2
#3B40A2
oklch(42.8% 0.156 275.4)
- #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 #3B40A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.026
- Sapphire #2138AB ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.042
- Cobalt #1E488F ΔE 0.049
- Majorelle Blue #3F37C9 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
Use #3B40A2 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.