#3A448B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.7% 0.117 274.2), rgb(58, 68, 139).
Aa
White text reads best on this color (8.82:1).
About this color
#3A448B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.117 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 8.82:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.82:1 |
Values
| HEX | #3A448B |
| RGB | rgb(58, 68, 139) |
| HSL | hsl(233, 41%, 39%) |
| OKLCH | oklch(41.7% 0.117 274.2) |
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 #3A448B | 8.82:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #3A448B | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #3A448B text on white | 8.82:1 | AAA | Lc 90.0 | Fine for body text |
| #3A448B text on black | 2.37:1 | Fails | Lc -12.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEEE
oklch(80.9% 0.069 273.8)
-
Step 400
400
#8B9BE5
oklch(70.6% 0.11 273.9)
-
Step 500
500
#7081DD
oklch(63.2% 0.139 273.9)
-
Step 600
600
#5A68CB
oklch(55.6% 0.152 274.3)
-
Step 700
700
#4A56B0
oklch(49.1% 0.142 274.2)
-
Step 800
800 (this color)
#3A448B
oklch(41.7% 0.117 274.2)
-
Step 900
900
#333C71
oklch(37.6% 0.091 274)
-
Step 950
950
#1E2442
oklch(27.1% 0.056 273.5)
#3A448B 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) | #204E8E | 0.036 |
| Deuteranopia (no green cones) | #134789 | 0.039 |
| Tritanopia (no blue cones) | #085461 | 0.103 |
| Achromatopsia (no color) | #4A4A4A | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A448B
#3A448B
oklch(41.7% 0.117 274.2)
- #5C4B00
#5C4B00
oklch(41.8% 0.086 94)
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 #3A448B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.027
- Cobalt #1E488F ΔE 0.031
- Dusk Blue #26538D ΔE 0.044
- Light Navy #155084 ΔE 0.049
- Twilight #4E518B ΔE 0.050
- Twilight Blue #0A437A ΔE 0.056
- Dusk #4E5481 ΔE 0.062
Use #3A448B 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.