#39388F
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.14 278.4), rgb(57, 56, 143).
Aa
White text reads best on this color (9.83:1).
About this color
#39388F is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.140 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 9.83:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #39388F |
| RGB | rgb(57, 56, 143) |
| HSL | hsl(241, 44%, 39%) |
| OKLCH | oklch(39.6% 0.14 278.4) |
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 #39388F | 9.83:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #39388F | 2.13:1 | Fails | Lc 11.5 | Not readable |
| #39388F text on white | 9.83:1 | AAA | Lc 92.4 | Preferred for body text |
| #39388F text on black | 2.13:1 | Fails | Lc -10.0 | 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
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7274FF
oklch(63% 0.202 278.3)
-
Step 600
600
#5E54F6
oklch(55.7% 0.232 278.4)
-
Step 700
700
#4E42D7
oklch(49.1% 0.218 278.3)
-
Step 800
800
#3F38AD
oklch(42.6% 0.179 278.2)
-
Step 900
900 (this color)
#39388F
oklch(39.6% 0.14 278.4)
-
Step 950
950
#1E1F50
oklch(27% 0.088 277.9)
#39388F 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) | #004792 | 0.056 |
| Deuteranopia (no green cones) | #00408D | 0.051 |
| Tritanopia (no blue cones) | #004D5E | 0.121 |
| Achromatopsia (no color) | #434343 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39388F
#39388F
oklch(39.6% 0.14 278.4)
- #524600
#524600
oklch(39.5% 0.082 98)
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 #39388F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.034
- Cobalt #1E488F ΔE 0.048
- Sapphire #2138AB ΔE 0.055
- Twilight Blue #0A437A ΔE 0.065
- Dusk Blue #26538D ΔE 0.074
- Light Navy #155084 ΔE 0.075
- Indigo Blue #3A18B1 ΔE 0.075
Use #39388F 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.