#312F68
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.097 281.5), rgb(49, 47, 104).
Aa
White text reads best on this color (12.08:1).
About this color
#312F68 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.097 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.046 away. White text reads best on it, at 12.08:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.08:1 |
Values
| HEX | #312F68 |
| RGB | rgb(49, 47, 104) |
| HSL | hsl(242, 38%, 30%) |
| OKLCH | oklch(34% 0.097 281.5) |
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 #312F68 | 12.08:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #312F68 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #312F68 text on white | 12.08:1 | AAA | Lc 97.4 | Preferred for body text |
| #312F68 text on black | 1.73:1 | 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 900.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D4D7F4
oklch(88.6% 0.04 280.9)
-
Step 300
300
#B8BCEF
oklch(81% 0.072 281.2)
-
Step 400
400
#9597E7
oklch(70.7% 0.116 281.9)
-
Step 500
500
#7C7BE0
oklch(63% 0.149 281.7)
-
Step 600
600
#6662CE
oklch(55.5% 0.162 281.4)
-
Step 700
700
#5551B2
oklch(49.1% 0.15 281.2)
-
Step 800
800
#464390
oklch(42.8% 0.123 281.6)
-
Step 900
900 (this color)
#312F68
oklch(34% 0.097 281.5)
-
Step 950
950
#222243
oklch(27% 0.06 281.6)
#312F68 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) | #12386A | 0.042 |
| Deuteranopia (no green cones) | #0D3467 | 0.043 |
| Tritanopia (no blue cones) | #1C3C46 | 0.085 |
| Achromatopsia (no color) | #363636 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312F68
#312F68
oklch(34% 0.097 281.5)
- #403900
#403900
oklch(34.1% 0.071 101.7)
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 #312F68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.046
- Marine Blue #01386A ΔE 0.050
- Marine #042E60 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.071
- Midnight Blue #191970 ΔE 0.072
- Gunmetal #293241 ΔE 0.074
Use #312F68 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.