#39377A
Closest named color: Dark Slate Blue (#483D8B). oklch(37.7% 0.111 281), rgb(57, 55, 122).
Aa
White text reads best on this color (10.49:1).
About this color
#39377A is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.111 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 10.49:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #39377A |
| RGB | rgb(57, 55, 122) |
| HSL | hsl(242, 38%, 35%) |
| OKLCH | oklch(37.7% 0.111 281) |
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 #39377A | 10.49:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #39377A | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #39377A text on white | 10.49:1 | AAA | Lc 94.1 | Preferred for body text |
| #39377A text on black | 2.00:1 | Fails | Lc -8.4 | 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
#B6BBF6
oklch(80.9% 0.083 280.6)
-
Step 400
400
#9295F1
oklch(70.6% 0.133 281)
-
Step 500
500
#7A78EC
oklch(63% 0.17 281.1)
-
Step 600
600
#655EDB
oklch(55.7% 0.185 281.1)
-
Step 700
700
#544CBE
oklch(49% 0.173 281.1)
-
Step 800
800
#444099
oklch(42.7% 0.141 280.6)
-
Step 900
900 (this color)
#39377A
oklch(37.7% 0.111 281)
-
Step 950
950
#212147
oklch(27% 0.069 280.7)
#39377A 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) | #13427C | 0.048 |
| Deuteranopia (no green cones) | #0C3D79 | 0.049 |
| Tritanopia (no blue cones) | #1F4653 | 0.095 |
| Achromatopsia (no color) | #3F3F3F | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39377A
#39377A
oklch(37.7% 0.111 281)
- #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 #39377A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.054
- Blueberry #464196 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Marine Blue #01386A ΔE 0.065
- Light Navy #155084 ΔE 0.074
- Prussian Blue #1D3557 ΔE 0.074
- Dark Grey Blue #29465B ΔE 0.079
Use #39377A 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.