#3B337C
Closest named color: Dark Slate Blue (#483D8B). oklch(37.2% 0.119 283.9), rgb(59, 51, 124).
Aa
White text reads best on this color (10.76:1).
About this color
#3B337C is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.119 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 10.76:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.76:1 |
Values
| HEX | #3B337C |
| RGB | rgb(59, 51, 124) |
| HSL | hsl(247, 42%, 34%) |
| OKLCH | oklch(37.2% 0.119 283.9) |
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 #3B337C | 10.76:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #3B337C | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #3B337C text on white | 10.76:1 | AAA | Lc 94.7 | Preferred for body text |
| #3B337C text on black | 1.95:1 | Fails | Lc -7.9 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D4D5FA
oklch(88.4% 0.051 284.1)
-
Step 300
300
#B9B9F9
oklch(80.8% 0.09 284.2)
-
Step 400
400
#9793F6
oklch(70.8% 0.142 284)
-
Step 500
500
#7F74F2
oklch(63.1% 0.183 283.8)
-
Step 600
600
#6B58E1
oklch(55.6% 0.2 284.1)
-
Step 700
700
#5947C3
oklch(49% 0.185 283.8)
-
Step 800
800
#493B9E
oklch(42.6% 0.154 284.2)
-
Step 900
900 (this color)
#3B337C
oklch(37.2% 0.119 283.9)
-
Step 950
950
#231F49
oklch(26.9% 0.075 284.4)
#3B337C 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) | #01407E | 0.061 |
| Deuteranopia (no green cones) | #003B7A | 0.060 |
| Tritanopia (no blue cones) | #224452 | 0.102 |
| Achromatopsia (no color) | #3E3E3E | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B337C
#3B337C
oklch(37.2% 0.119 283.9)
- #484200
#484200
oklch(37.3% 0.079 103.7)
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 #3B337C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.063
- Cobalt #1E488F ΔE 0.066
- Marine Blue #01386A ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.080
- Indigo #4B0082 ΔE 0.082
- Light Navy #155084 ΔE 0.084
Use #3B337C 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.