#3D4479
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.089 276), rgb(61, 68, 121).
Aa
White text reads best on this color (9.12:1).
About this color
#3D4479 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.089 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 9.12:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #3D4479 |
| RGB | rgb(61, 68, 121) |
| HSL | hsl(233, 33%, 36%) |
| OKLCH | oklch(40.7% 0.089 276) |
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 #3D4479 | 9.12:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #3D4479 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #3D4479 text on white | 9.12:1 | AAA | Lc 90.9 | Preferred for body text |
| #3D4479 text on black | 2.30:1 | Fails | Lc -11.4 | 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
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B7BEE3
oklch(80.8% 0.053 276.7)
-
Step 400
400
#929CD5
oklch(70.6% 0.084 276.3)
-
Step 500
500
#7883C9
oklch(63% 0.106 276.1)
-
Step 600
600
#626CB6
oklch(55.7% 0.115 276.2)
-
Step 700
700
#515A9D
oklch(49.2% 0.107 275.9)
-
Step 800
800 (this color)
#3D4479
oklch(40.7% 0.089 276)
-
Step 900
900
#383E66
oklch(37.8% 0.069 276.1)
-
Step 950
950
#21243C
oklch(27% 0.045 277.5)
#3D4479 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) | #2F4B7B | 0.025 |
| Deuteranopia (no green cones) | #2A4678 | 0.025 |
| Tritanopia (no blue cones) | #274F58 | 0.079 |
| Achromatopsia (no color) | #484848 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4479
#3D4479
oklch(40.7% 0.089 276)
- #574900
#574900
oklch(40.8% 0.084 96.5)
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 #3D4479, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Cobalt #1E488F ΔE 0.048
- Light Navy #155084 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.051
- Blueberry #464196 ΔE 0.052
- Dusk Blue #26538D ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Dusk #4E5481 ΔE 0.056
Use #3D4479 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.