#3D3C8E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.132 279.3), rgb(61, 60, 142).
Aa
White text reads best on this color (9.39:1).
About this color
#3D3C8E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.132 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #3D3C8E |
| RGB | rgb(61, 60, 142) |
| HSL | hsl(241, 41%, 40%) |
| OKLCH | oklch(40.5% 0.132 279.3) |
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 #3D3C8E | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #3D3C8E | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #3D3C8E text on white | 9.39:1 | AAA | Lc 91.4 | Preferred for body text |
| #3D3C8E text on black | 2.23:1 | Fails | Lc -11.0 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D3D7F6
oklch(88.6% 0.043 279.7)
-
Step 300
300
#B6BCF3
oklch(81% 0.078 279.7)
-
Step 400
400
#9197EC
oklch(70.6% 0.124 279.6)
-
Step 500
500
#777BE6
oklch(63% 0.158 279.2)
-
Step 600
600
#6262D4
oklch(55.6% 0.171 279.3)
-
Step 700
700
#5150B8
oklch(49.1% 0.16 279.2)
-
Step 800
800 (this color)
#3D3C8E
oklch(40.5% 0.132 279.3)
-
Step 900
900
#373977
oklch(37.7% 0.104 278.8)
-
Step 950
950
#202245
oklch(27% 0.064 278.7)
#3D3C8E 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) | #004A91 | 0.058 |
| Deuteranopia (no green cones) | #00438C | 0.055 |
| Tritanopia (no blue cones) | #144F5F | 0.114 |
| Achromatopsia (no color) | #464646 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3C8E
#3D3C8E
oklch(40.5% 0.132 279.3)
- #544900
#544900
oklch(40.4% 0.084 99.4)
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 #3D3C8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.024
- Cobalt #1E488F ΔE 0.044
- Sapphire #2138AB ΔE 0.061
- Twilight Blue #0A437A ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
- Twilight #4E518B ΔE 0.067
- Light Navy #155084 ΔE 0.068
Use #3D3C8E 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.