#393F80
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.108 276.3), rgb(57, 63, 128).
Aa
White text reads best on this color (9.55:1).
About this color
#393F80 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.108 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #393F80 |
| RGB | rgb(57, 63, 128) |
| HSL | hsl(235, 38%, 36%) |
| OKLCH | oklch(39.8% 0.108 276.3) |
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 #393F80 | 9.55:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #393F80 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #393F80 text on white | 9.55:1 | AAA | Lc 91.9 | Preferred for body text |
| #393F80 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B2BDF5
oklch(80.9% 0.08 275.8)
-
Step 400
400
#8C98F1
oklch(70.7% 0.13 276.7)
-
Step 500
500
#717CEB
oklch(63.1% 0.165 276.3)
-
Step 600
600
#5B62DA
oklch(55.6% 0.181 276.3)
-
Step 700
700
#4B50BD
oklch(49% 0.168 276.3)
-
Step 800
800
#3E4399
oklch(42.8% 0.138 276.4)
-
Step 900
900 (this color)
#393F80
oklch(39.8% 0.108 276.3)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#393F80 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) | #204882 | 0.035 |
| Deuteranopia (no green cones) | #17427F | 0.038 |
| Tritanopia (no blue cones) | #184D59 | 0.095 |
| Achromatopsia (no color) | #454545 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393F80
#393F80
oklch(39.8% 0.108 276.3)
- #544600
#544600
oklch(39.7% 0.082 96)
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 #393F80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Cobalt #1E488F ΔE 0.041
- Blueberry #464196 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.047
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.058
- Twilight #4E518B ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.068
Use #393F80 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.