#3B3C84
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.118 279), rgb(59, 60, 132).
Aa
White text reads best on this color (9.69:1).
About this color
#3B3C84 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.118 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.025 away. White text reads best on it, at 9.69:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.69:1 |
Values
| HEX | #3B3C84 |
| RGB | rgb(59, 60, 132) |
| HSL | hsl(239, 38%, 37%) |
| OKLCH | oklch(39.6% 0.118 279) |
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 #3B3C84 | 9.69:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #3B3C84 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #3B3C84 text on white | 9.69:1 | AAA | Lc 92.2 | Preferred for body text |
| #3B3C84 text on black | 2.16:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D1D6FA
oklch(88.4% 0.05 279.1)
-
Step 300
300
#B4BBFA
oklch(80.9% 0.089 279.3)
-
Step 400
400
#8E95F7
oklch(70.6% 0.142 279)
-
Step 500
500
#7578F3
oklch(63.1% 0.18 278.8)
-
Step 600
600
#605DE2
oklch(55.6% 0.196 278.9)
-
Step 700
700
#504BC4
oklch(49% 0.183 279.1)
-
Step 800
800
#413F9F
oklch(42.8% 0.151 278.8)
-
Step 900
900 (this color)
#3B3C84
oklch(39.6% 0.118 279)
-
Step 950
950
#20214A
oklch(27.1% 0.074 279.2)
#3B3C84 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) | #144787 | 0.047 |
| Deuteranopia (no green cones) | #084182 | 0.050 |
| Tritanopia (no blue cones) | #1A4C5A | 0.102 |
| Achromatopsia (no color) | #444444 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3C84
#3B3C84
oklch(39.6% 0.118 279)
- #524700
#524700
oklch(39.7% 0.082 99.1)
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 #3B3C84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.025
- Blueberry #464196 ΔE 0.037
- Cobalt #1E488F ΔE 0.044
- Twilight Blue #0A437A ΔE 0.054
- Light Navy #155084 ΔE 0.063
- Dusk Blue #26538D ΔE 0.065
- Twilight #4E518B ΔE 0.068
- Sapphire #2138AB ΔE 0.073
Use #3B3C84 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.