#312B63
Closest named color: Prussian Blue (#1D3557). oklch(32.8% 0.095 284.7), rgb(49, 43, 99).
Aa
White text reads best on this color (12.67:1).
About this color
#312B63 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.095 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.047 away. White text reads best on it, at 12.67:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.65:1 |
| White text | 12.67:1 |
Values
| HEX | #312B63 |
| RGB | rgb(49, 43, 99) |
| HSL | hsl(246, 39%, 28%) |
| OKLCH | oklch(32.8% 0.095 284.7) |
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 #312B63 | 12.67:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #312B63 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #312B63 text on white | 12.67:1 | AAA | Lc 98.5 | Preferred for body text |
| #312B63 text on black | 1.65:1 | 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
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F3
oklch(88.5% 0.04 285.6)
-
Step 300
300
#BBBBEE
oklch(80.9% 0.072 284.7)
-
Step 400
400
#9996E5
oklch(70.7% 0.114 284.8)
-
Step 500
500
#817ADE
oklch(63.1% 0.147 284.5)
-
Step 600
600
#6C61CB
oklch(55.6% 0.159 284.7)
-
Step 700
700
#5A4FB0
oklch(49% 0.149 284.6)
-
Step 800
800
#4A428E
oklch(42.8% 0.121 284.8)
-
Step 900
900 (this color)
#312B63
oklch(32.8% 0.095 284.7)
-
Step 950
950
#242143
oklch(27% 0.062 285.5)
#312B63 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) | #0E3465 | 0.046 |
| Deuteranopia (no green cones) | #0C3162 | 0.047 |
| Tritanopia (no blue cones) | #203742 | 0.081 |
| Achromatopsia (no color) | #333333 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312B63
#312B63
oklch(32.8% 0.095 284.7)
- #3B3600
#3B3600
oklch(32.8% 0.069 103.8)
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 #312B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.047
- Marine #042E60 ΔE 0.053
- Marine Blue #01386A ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.062
- Midnight Blue #191970 ΔE 0.067
- Gunmetal #293241 ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.072
- Twilight Blue #0A437A ΔE 0.078
Use #312B63 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.