#312A64
Closest named color: Prussian Blue (#1D3557). oklch(32.7% 0.099 285), rgb(49, 42, 100).
Aa
White text reads best on this color (12.75:1).
About this color
#312A64 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.099 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.050 away. White text reads best on it, at 12.75:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.75:1 |
Values
| HEX | #312A64 |
| RGB | rgb(49, 42, 100) |
| HSL | hsl(247, 41%, 28%) |
| OKLCH | oklch(32.7% 0.099 285) |
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 #312A64 | 12.75:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #312A64 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #312A64 text on white | 12.75:1 | AAA | Lc 98.6 | Preferred for body text |
| #312A64 text on black | 1.64:1 | 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
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BBBBEF
oklch(81% 0.073 284.7)
-
Step 400
400
#9995E7
oklch(70.6% 0.119 285.2)
-
Step 500
500
#8279E0
oklch(63.1% 0.151 285.2)
-
Step 600
600
#6C60CE
oklch(55.6% 0.164 284.7)
-
Step 700
700
#5B4EB2
oklch(49.1% 0.153 285.2)
-
Step 800
800
#4A4190
oklch(42.7% 0.126 284.9)
-
Step 900
900 (this color)
#312A64
oklch(32.7% 0.099 285)
-
Step 950
950
#242143
oklch(27% 0.062 285.5)
#312A64 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) | #0A3466 | 0.050 |
| Deuteranopia (no green cones) | #073163 | 0.050 |
| Tritanopia (no blue cones) | #1F3742 | 0.084 |
| Achromatopsia (no color) | #323232 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312A64
#312A64
oklch(32.7% 0.099 285)
- #3A3600
#3A3600
oklch(32.7% 0.069 105)
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 #312A64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.050
- Marine #042E60 ΔE 0.053
- Marine Blue #01386A ΔE 0.058
- Midnight Blue #191970 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.073
- Dark Blue Grey #1F3B4D ΔE 0.076
- Twilight Blue #0A437A ΔE 0.080
Use #312A64 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.