#39447A
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.092 273), rgb(57, 68, 122).
Aa
White text reads best on this color (9.20:1).
About this color
#39447A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.092 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 9.20:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #39447A |
| RGB | rgb(57, 68, 122) |
| HSL | hsl(230, 36%, 35%) |
| OKLCH | oklch(40.5% 0.092 273) |
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 #39447A | 9.20:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #39447A | 2.28:1 | Fails | Lc 12.9 | Not readable |
| #39447A text on white | 9.20:1 | AAA | Lc 91.1 | Preferred for body text |
| #39447A text on black | 2.28:1 | Fails | Lc -11.3 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B5BFE4
oklch(80.9% 0.053 273.3)
-
Step 400
400
#8F9DD7
oklch(70.7% 0.087 273.5)
-
Step 500
500
#7484CC
oklch(63.1% 0.11 273.3)
-
Step 600
600
#5D6DB8
oklch(55.6% 0.118 272.9)
-
Step 700
700
#4D5A9F
oklch(49% 0.111 273.6)
-
Step 800
800 (this color)
#39447A
oklch(40.5% 0.092 273)
-
Step 900
900
#353E67
oklch(37.6% 0.071 273.1)
-
Step 950
950
#1F253D
oklch(27.1% 0.046 272.4)
#39447A 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) | #2E4B7C | 0.023 |
| Deuteranopia (no green cones) | #274579 | 0.023 |
| Tritanopia (no blue cones) | #1D5059 | 0.082 |
| Achromatopsia (no color) | #484848 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39447A
#39447A
oklch(40.5% 0.092 273)
- #584700
#584700
oklch(40.4% 0.083 93.2)
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 #39447A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Cobalt #1E488F ΔE 0.044
- Light Navy #155084 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.046
- Dusk Blue #26538D ΔE 0.050
- Blueberry #464196 ΔE 0.052
- Twilight #4E518B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
Use #39447A 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.