#39447E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.098 273.2), rgb(57, 68, 126).
Aa
White text reads best on this color (9.12:1).
About this color
#39447E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.098 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 9.12:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #39447E |
| RGB | rgb(57, 68, 126) |
| HSL | hsl(230, 38%, 36%) |
| OKLCH | oklch(40.7% 0.098 273.2) |
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 #39447E | 9.12:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #39447E | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #39447E text on white | 9.12:1 | AAA | Lc 90.8 | Preferred for body text |
| #39447E text on black | 2.30:1 | Fails | Lc -11.5 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE6
oklch(80.9% 0.056 272.7)
-
Step 400
400
#8E9DDA
oklch(70.8% 0.091 273.2)
-
Step 500
500
#7383D0
oklch(63% 0.117 273.7)
-
Step 600
600
#5C6CBD
oklch(55.7% 0.127 273.2)
-
Step 700
700
#4C5AA3
oklch(49.2% 0.117 273.2)
-
Step 800
800 (this color)
#39447E
oklch(40.7% 0.098 273.2)
-
Step 900
900
#353E6A
oklch(37.8% 0.076 273.5)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#39447E 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) | #2B4B80 | 0.024 |
| Deuteranopia (no green cones) | #23457D | 0.026 |
| Tritanopia (no blue cones) | #19515B | 0.087 |
| Achromatopsia (no color) | #484848 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39447E
#39447E
oklch(40.7% 0.098 273.2)
- #594800
#594800
oklch(40.7% 0.083 93.4)
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 #39447E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Cobalt #1E488F ΔE 0.039
- Light Navy #155084 ΔE 0.044
- Blueberry #464196 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
- Twilight #4E518B ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.057
Use #39447E 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.