#311E68
Closest named color: Midnight Blue (#191970). oklch(30.8% 0.122 289), rgb(49, 30, 104).
Aa
White text reads best on this color (13.85:1).
About this color
#311E68 is a dark, moderately saturated purple. In OKLCH its lightness is 31%, its chroma 0.122 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.048 away. White text reads best on it, at 13.85:1.
| Hue family | Purples |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.51:1 |
| White text | 13.85:1 |
Values
| HEX | #311E68 |
| RGB | rgb(49, 30, 104) |
| HSL | hsl(255, 55%, 26%) |
| OKLCH | oklch(30.8% 0.122 289) |
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 #311E68 | 13.85:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #311E68 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #311E68 text on white | 13.85:1 | AAA | Lc 100.0 | Preferred for body text |
| #311E68 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
#E9E7FF
oklch(93.7% 0.032 289.6)
-
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
#9F8CFF
oklch(70.7% 0.164 289.1)
-
Step 500
500
#8A69FF
oklch(63.1% 0.213 288.9)
-
Step 600
600
#793CFF
oklch(55.6% 0.263 289)
-
Step 700
700
#6A00F0
oklch(49.2% 0.28 289)
-
Step 800
800
#5700C7
oklch(42.7% 0.243 289.2)
-
Step 900
900
#46179E
oklch(37.6% 0.193 289)
-
Step 950
950 (this color)
#311E68
oklch(30.8% 0.122 289)
#311E68 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) | #002E6A | 0.065 |
| Deuteranopia (no green cones) | #002B67 | 0.063 |
| Tritanopia (no blue cones) | #1E3040 | 0.098 |
| Achromatopsia (no color) | #2D2D2D | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311E68
#311E68
oklch(30.8% 0.122 289)
- #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 #311E68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.048
- Royal Purple #4B006E ΔE 0.065
- Marine #042E60 ΔE 0.066
- Dark Indigo #1F0954 ΔE 0.070
- Indigo #4B0082 ΔE 0.073
- Prussian Blue #1D3557 ΔE 0.076
- Marine Blue #01386A ΔE 0.079
- Plum Purple #4E0550 ΔE 0.084
Use #311E68 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.