#393A8C
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.133 277.9), rgb(57, 58, 140).
Aa
White text reads best on this color (9.73:1).
About this color
#393A8C is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.133 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.027 away. White text reads best on it, at 9.73:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #393A8C |
| RGB | rgb(57, 58, 140) |
| HSL | hsl(239, 42%, 39%) |
| OKLCH | oklch(39.7% 0.133 277.9) |
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 #393A8C | 9.73:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #393A8C | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #393A8C text on white | 9.73:1 | AAA | Lc 92.2 | Preferred for body text |
| #393A8C text on black | 2.15:1 | Fails | Lc -10.2 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FE
oklch(88.4% 0.055 278.5)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8B94FF
oklch(70.6% 0.155 278)
-
Step 500
500
#7175FF
oklch(63.1% 0.201 277.7)
-
Step 600
600
#5D57F0
oklch(55.6% 0.222 278.1)
-
Step 700
700
#4D46D1
oklch(49.1% 0.206 277.9)
-
Step 800
800
#3F3BA9
oklch(42.8% 0.17 278)
-
Step 900
900 (this color)
#393A8C
oklch(39.7% 0.133 277.9)
-
Step 950
950
#1E1F4E
oklch(26.9% 0.085 278.1)
#393A8C 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) | #00488F | 0.054 |
| Deuteranopia (no green cones) | #00418A | 0.051 |
| Tritanopia (no blue cones) | #044D5D | 0.115 |
| Achromatopsia (no color) | #444444 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393A8C
#393A8C
oklch(39.7% 0.133 277.9)
- #534700
#534700
oklch(39.8% 0.082 98.2)
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 #393A8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.027
- Blueberry #464196 ΔE 0.033
- Cobalt #1E488F ΔE 0.044
- Sapphire #2138AB ΔE 0.059
- Twilight Blue #0A437A ΔE 0.060
- Dusk Blue #26538D ΔE 0.069
- Light Navy #155084 ΔE 0.069
- Twilight #4E518B ΔE 0.074
Use #393A8C 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.