#393F75
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.091 276.5), rgb(57, 63, 117).
Aa
White text reads best on this color (9.80:1).
About this color
#393F75 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.091 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.045 away. White text reads best on it, at 9.80:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.80:1 |
Values
| HEX | #393F75 |
| RGB | rgb(57, 63, 117) |
| HSL | hsl(234, 34%, 34%) |
| OKLCH | oklch(39% 0.091 276.5) |
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 #393F75 | 9.80:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #393F75 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #393F75 text on white | 9.80:1 | AAA | Lc 92.6 | Preferred for body text |
| #393F75 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BDED
oklch(80.8% 0.069 276.5)
-
Step 400
400
#8F9AE4
oklch(70.7% 0.109 276.8)
-
Step 500
500
#747FDC
oklch(63% 0.139 276.5)
-
Step 600
600
#5E67CA
oklch(55.6% 0.151 276.4)
-
Step 700
700
#4E55AF
oklch(49.1% 0.141 276.5)
-
Step 800
800
#40468E
oklch(42.8% 0.117 276.6)
-
Step 900
900 (this color)
#393F75
oklch(39% 0.091 276.5)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#393F75 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) | #294677 | 0.027 |
| Deuteranopia (no green cones) | #244174 | 0.027 |
| Tritanopia (no blue cones) | #224A54 | 0.079 |
| Achromatopsia (no color) | #444444 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393F75
#393F75
oklch(39% 0.091 276.5)
- #524400
#524400
oklch(39% 0.08 95.7)
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 #393F75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.045
- Cobalt #1E488F ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.059
- Blueberry #464196 ΔE 0.059
- Dusk Blue #26538D ΔE 0.064
- Marine Blue #01386A ΔE 0.066
Use #393F75 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.