#39307F
Closest named color: Dark Slate Blue (#483D8B). oklch(36.7% 0.128 283.2), rgb(57, 48, 127).
Aa
White text reads best on this color (11.03:1).
About this color
#39307F is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.128 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 11.03:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #39307F |
| RGB | rgb(57, 48, 127) |
| HSL | hsl(247, 45%, 34%) |
| OKLCH | oklch(36.7% 0.128 283.2) |
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 #39307F | 11.03:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #39307F | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #39307F text on white | 11.03:1 | AAA | Lc 95.2 | Preferred for body text |
| #39307F text on black | 1.90:1 | Fails | Lc -7.5 | 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
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D4D5FC
oklch(88.5% 0.053 284.1)
-
Step 300
300
#B8B9FD
oklch(80.9% 0.096 283.4)
-
Step 400
400
#9591FD
oklch(70.7% 0.155 283.4)
-
Step 500
500
#7E71FA
oklch(63% 0.197 283.5)
-
Step 600
600
#6955E9
oklch(55.6% 0.214 283.1)
-
Step 700
700
#5844CB
oklch(49.1% 0.199 283)
-
Step 800
800
#4839A4
oklch(42.7% 0.165 283.3)
-
Step 900
900 (this color)
#39307F
oklch(36.7% 0.128 283.2)
-
Step 950
950
#221F4C
oklch(27% 0.081 282.6)
#39307F 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) | #003F82 | 0.061 |
| Deuteranopia (no green cones) | #00397D | 0.059 |
| Tritanopia (no blue cones) | #1B4352 | 0.110 |
| Achromatopsia (no color) | #3C3C3C | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39307F
#39307F
oklch(36.7% 0.128 283.2)
- #474000
#474000
oklch(36.7% 0.077 102.5)
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 #39307F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Blueberry #464196 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.067
- Cobalt #1E488F ΔE 0.069
- Marine Blue #01386A ΔE 0.072
- Indigo #4B0082 ΔE 0.076
- Sapphire #2138AB ΔE 0.080
- Prussian Blue #1D3557 ΔE 0.084
Use #39307F 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.