#39337D
Closest named color: Dark Slate Blue (#483D8B). oklch(37.1% 0.121 282.4), rgb(57, 51, 125).
Aa
White text reads best on this color (10.80:1).
About this color
#39337D is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.121 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.80:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.80:1 |
Values
| HEX | #39337D |
| RGB | rgb(57, 51, 125) |
| HSL | hsl(245, 42%, 35%) |
| OKLCH | oklch(37.1% 0.121 282.4) |
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 #39337D | 10.80:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #39337D | 1.94:1 | Fails | Lc 9.2 | Not readable |
| #39337D text on white | 10.80:1 | AAA | Lc 94.7 | Preferred for body text |
| #39337D text on black | 1.94:1 | 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
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D3D6FA
oklch(88.5% 0.05 281.6)
-
Step 300
300
#B7BAFA
oklch(80.9% 0.09 282.1)
-
Step 400
400
#9493F8
oklch(70.7% 0.146 282.5)
-
Step 500
500
#7C74F5
oklch(63.1% 0.187 282.4)
-
Step 600
600
#6759E3
oklch(55.6% 0.201 282.2)
-
Step 700
700
#5748C5
oklch(49.2% 0.187 282.5)
-
Step 800
800
#463CA0
oklch(42.7% 0.156 282.1)
-
Step 900
900 (this color)
#39337D
oklch(37.1% 0.121 282.4)
-
Step 950
950
#22204A
oklch(27.1% 0.076 282.2)
#39337D 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) | #00407F | 0.059 |
| Deuteranopia (no green cones) | #003B7B | 0.057 |
| Tritanopia (no blue cones) | #1D4452 | 0.104 |
| Achromatopsia (no color) | #3D3D3D | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39337D
#39337D
oklch(37.1% 0.121 282.4)
- #484100
#484100
oklch(37.1% 0.078 102.6)
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 #39337D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
- Cobalt #1E488F ΔE 0.064
- Marine Blue #01386A ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.079
- Sapphire #2138AB ΔE 0.082
- Indigo #4B0082 ΔE 0.083
Use #39337D 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.