#3D429D
Closest named color: Blueberry (#464196). oklch(42.9% 0.145 276), rgb(61, 66, 157).
Aa
White text reads best on this color (8.52:1).
About this color
#3D429D is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.145 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.017 away. White text reads best on it, at 8.52:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #3D429D |
| RGB | rgb(61, 66, 157) |
| HSL | hsl(237, 44%, 43%) |
| OKLCH | oklch(42.9% 0.145 276) |
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 #3D429D | 8.52:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #3D429D | 2.46:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #3D429D text on white | 8.52:1 | AAA | Lc 89.0 | Fine for body text |
| #3D429D text on black | 2.46:1 | Fails | Lc -13.2 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7F9
oklch(88.5% 0.047 276.2)
-
Step 300
300
#B1BCF8
oklch(80.8% 0.086 276.3)
-
Step 400
400
#8A98F4
oklch(70.7% 0.135 275.8)
-
Step 500
500
#6F7BF0
oklch(63.1% 0.174 275.8)
-
Step 600
600
#5A61DF
oklch(55.7% 0.189 276)
-
Step 700
700
#4A4FC1
oklch(49.1% 0.175 275.9)
-
Step 800
800 (this color)
#3D429D
oklch(42.9% 0.145 276)
-
Step 900
900
#33397C
oklch(37.8% 0.112 275.8)
-
Step 950
950
#1E2249
oklch(27.1% 0.072 276.1)
#3D429D 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) | #0051A0 | 0.055 |
| Deuteranopia (no green cones) | #00489B | 0.050 |
| Tritanopia (no blue cones) | #005869 | 0.125 |
| Achromatopsia (no color) | #4C4C4C | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D429D
#3D429D
oklch(42.9% 0.145 276)
- #5E4F00
#5E4F00
oklch(43% 0.089 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 #3D429D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.017
- Dark Slate Blue #483D8B ΔE 0.035
- Cobalt #1E488F ΔE 0.044
- Sapphire #2138AB ΔE 0.050
- Dusk Blue #26538D ΔE 0.059
- Twilight #4E518B ΔE 0.061
- Light Navy #155084 ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.073
Use #3D429D 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.