#3D438B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.7% 0.118 276.4), rgb(61, 67, 139).
Aa
White text reads best on this color (8.84:1).
About this color
#3D438B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.118 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.022 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #3D438B |
| RGB | rgb(61, 67, 139) |
| HSL | hsl(235, 39%, 39%) |
| OKLCH | oklch(41.7% 0.118 276.4) |
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 #3D438B | 8.84:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #3D438B | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #3D438B text on white | 8.84:1 | AAA | Lc 90.0 | Preferred for body text |
| #3D438B 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BDEE
oklch(80.8% 0.07 276.6)
-
Step 400
400
#8E9AE5
oklch(70.7% 0.111 276.2)
-
Step 500
500
#747FDD
oklch(63% 0.141 276.5)
-
Step 600
600
#5E67CB
oklch(55.7% 0.153 276.4)
-
Step 700
700
#4E55B0
oklch(49.2% 0.143 276.5)
-
Step 800
800 (this color)
#3D438B
oklch(41.7% 0.118 276.4)
-
Step 900
900
#353B71
oklch(37.6% 0.092 276.3)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#3D438B 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) | #1E4D8E | 0.040 |
| Deuteranopia (no green cones) | #134789 | 0.044 |
| Tritanopia (no blue cones) | #165360 | 0.104 |
| Achromatopsia (no color) | #4A4A4A | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D438B
#3D438B
oklch(41.7% 0.118 276.4)
- #5A4C00
#5A4C00
oklch(41.8% 0.086 96.9)
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 #3D438B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.022
- Blueberry #464196 ΔE 0.024
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.048
- Twilight #4E518B ΔE 0.049
- Light Navy #155084 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.060
- Dusk #4E5481 ΔE 0.062
Use #3D438B 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.