#39377B
Closest named color: Dark Slate Blue (#483D8B). oklch(37.8% 0.112 280.9), rgb(57, 55, 123).
Aa
White text reads best on this color (10.46:1).
About this color
#39377B is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.112 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 10.46:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #39377B |
| RGB | rgb(57, 55, 123) |
| HSL | hsl(242, 38%, 35%) |
| OKLCH | oklch(37.8% 0.112 280.9) |
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 #39377B | 10.46:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #39377B | 2.00:1 | Fails | Lc 9.9 | Not readable |
| #39377B text on white | 10.46:1 | AAA | Lc 94.1 | Preferred for body text |
| #39377B text on black | 2.00:1 | Fails | Lc -8.5 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FA
oklch(93.5% 0.024 280.9)
-
Step 200
200
#D3D6F8
oklch(88.5% 0.047 281.4)
-
Step 300
300
#B6BBF7
oklch(80.9% 0.085 280.6)
-
Step 400
400
#9295F2
oklch(70.6% 0.135 281)
-
Step 500
500
#7A78EE
oklch(63.2% 0.173 281)
-
Step 600
600
#645DDC
oklch(55.5% 0.188 280.8)
-
Step 700
700
#544CBF
oklch(49.1% 0.174 281)
-
Step 800
800
#443F9A
oklch(42.6% 0.144 280.8)
-
Step 900
900 (this color)
#39377B
oklch(37.8% 0.112 280.9)
-
Step 950
950
#212148
oklch(27.1% 0.071 280.6)
#39377B 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) | #12427D | 0.049 |
| Deuteranopia (no green cones) | #093D7A | 0.050 |
| Tritanopia (no blue cones) | #1E4653 | 0.097 |
| Achromatopsia (no color) | #3F3F3F | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39377B
#39377B
oklch(37.8% 0.112 280.9)
- #4B4200
#4B4200
oklch(37.7% 0.078 100.6)
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 #39377B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Twilight Blue #0A437A ΔE 0.054
- Blueberry #464196 ΔE 0.056
- Cobalt #1E488F ΔE 0.058
- Marine Blue #01386A ΔE 0.066
- Light Navy #155084 ΔE 0.074
- Prussian Blue #1D3557 ΔE 0.076
- Dusk Blue #26538D ΔE 0.080
Use #39377B 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.