#311D6A
Closest named color: Midnight Blue (#191970). oklch(30.9% 0.126 288.7), rgb(49, 29, 106).
Aa
White text reads best on this color (13.86:1).
About this color
#311D6A is a dark, moderately saturated purple. In OKLCH its lightness is 31%, its chroma 0.126 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.046 away. White text reads best on it, at 13.86:1.
| Hue family | Purples |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.51:1 |
| White text | 13.86:1 |
Values
| HEX | #311D6A |
| RGB | rgb(49, 29, 106) |
| HSL | hsl(256, 57%, 26%) |
| OKLCH | oklch(30.9% 0.126 288.7) |
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 #311D6A | 13.86:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #311D6A | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #311D6A text on white | 13.86:1 | AAA | Lc 100.0 | Preferred for body text |
| #311D6A text on black | 1.51:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E8E7FF
oklch(93.6% 0.032 287.7)
-
Step 200
200
#D7D3FF
oklch(88.4% 0.06 289.3)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9E8CFF
oklch(70.6% 0.164 288.7)
-
Step 500
500
#8A6AFF
oklch(63.2% 0.212 288.7)
-
Step 600
600
#783CFF
oklch(55.5% 0.264 288.7)
-
Step 700
700
#6900F0
oklch(49.1% 0.28 288.7)
-
Step 800
800
#5600C8
oklch(42.7% 0.244 288.6)
-
Step 900
900
#4613A1
oklch(37.7% 0.199 288.6)
-
Step 950
950 (this color)
#311D6A
oklch(30.9% 0.126 288.7)
#311D6A 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) | #002E6C | 0.065 |
| Deuteranopia (no green cones) | #002B68 | 0.064 |
| Tritanopia (no blue cones) | #1C3141 | 0.103 |
| Achromatopsia (no color) | #2D2D2D | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311D6A
#311D6A
oklch(30.9% 0.126 288.7)
- #333200
#333200
oklch(30.8% 0.067 108.5)
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 #311D6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.046
- Royal Purple #4B006E ΔE 0.064
- Marine #042E60 ΔE 0.068
- Indigo #4B0082 ΔE 0.070
- Dark Indigo #1F0954 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.079
- Marine Blue #01386A ΔE 0.081
- Plum Purple #4E0550 ΔE 0.086
Use #311D6A 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.