#311D65
Closest named color: Midnight Blue (#191970). oklch(30.4% 0.12 290.2), rgb(49, 29, 101).
Aa
White text reads best on this color (14.05:1).
About this color
#311D65 is a dark, moderately saturated purple. In OKLCH its lightness is 30%, its chroma 0.120 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.049 away. White text reads best on it, at 14.05:1.
| Hue family | Purples |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.49:1 |
| White text | 14.05:1 |
Values
| HEX | #311D65 |
| RGB | rgb(49, 29, 101) |
| HSL | hsl(257, 55%, 25%) |
| OKLCH | oklch(30.4% 0.12 290.2) |
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 #311D65 | 14.05:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #311D65 | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #311D65 text on white | 14.05:1 | AAA | Lc 100.3 | Preferred for body text |
| #311D65 text on black | 1.49:1 | 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
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#BFB5FF
oklch(80.8% 0.104 290.1)
-
Step 400
400
#A18BFF
oklch(70.7% 0.166 290.2)
-
Step 500
500
#8D68FF
oklch(63.2% 0.214 290.2)
-
Step 600
600
#7C39FF
oklch(55.6% 0.266 290.2)
-
Step 700
700
#6C00ED
oklch(49% 0.277 290.2)
-
Step 800
800
#5900C5
oklch(42.7% 0.241 290.4)
-
Step 900
900
#48199B
oklch(37.7% 0.188 290.5)
-
Step 950
950 (this color)
#311D65
oklch(30.4% 0.12 290.2)
#311D65 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) | #002D67 | 0.066 |
| Deuteranopia (no green cones) | #002A64 | 0.064 |
| Tritanopia (no blue cones) | #202F3E | 0.097 |
| Achromatopsia (no color) | #2C2C2C | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311D65
#311D65
oklch(30.4% 0.12 290.2)
- #313100
#313100
oklch(30.3% 0.066 109.8)
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 #311D65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.049
- Royal Purple #4B006E ΔE 0.065
- Dark Indigo #1F0954 ΔE 0.066
- Marine #042E60 ΔE 0.067
- Indigo #4B0082 ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.076
- Plum Purple #4E0550 ΔE 0.081
- Marine Blue #01386A ΔE 0.082
Use #311D65 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.