#3D4881
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.096 273.4), rgb(61, 72, 129).
Aa
White text reads best on this color (8.59:1).
About this color
#3D4881 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.096 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 8.59:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #3D4881 |
| RGB | rgb(61, 72, 129) |
| HSL | hsl(230, 36%, 37%) |
| OKLCH | oklch(42.1% 0.096 273.4) |
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 #3D4881 | 8.59:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #3D4881 | 2.44:1 | Fails | Lc 14.6 | Not readable |
| #3D4881 text on white | 8.59:1 | AAA | Lc 89.4 | Fine for body text |
| #3D4881 text on black | 2.44:1 | Fails | Lc -12.8 | 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
#D2D8EE
oklch(88.4% 0.031 273.6)
-
Step 300
300
#B5BFE5
oklch(81% 0.055 273.5)
-
Step 400
400
#8E9DD9
oklch(70.7% 0.09 273.1)
-
Step 500
500
#7384CE
oklch(63.1% 0.113 272.9)
-
Step 600
600
#5D6CBB
oklch(55.6% 0.124 273.6)
-
Step 700
700
#4C5AA1
oklch(49.1% 0.114 273.1)
-
Step 800
800 (this color)
#3D4881
oklch(42.1% 0.096 273.4)
-
Step 900
900
#353E69
oklch(37.7% 0.074 273.4)
-
Step 950
950
#1F243D
oklch(26.8% 0.047 274.2)
#3D4881 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) | #314F83 | 0.023 |
| Deuteranopia (no green cones) | #2A4980 | 0.024 |
| Tritanopia (no blue cones) | #20545E | 0.084 |
| Achromatopsia (no color) | #4C4C4C | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4881
#3D4881
oklch(42.1% 0.096 273.4)
- #5D4C00
#5D4C00
oklch(42.2% 0.086 94.1)
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 #3D4881, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Twilight #4E518B ΔE 0.040
- Cobalt #1E488F ΔE 0.041
- Light Navy #155084 ΔE 0.042
- Blueberry #464196 ΔE 0.043
- Dusk #4E5481 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.052
Use #3D4881 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.