#312E57
Closest named color: Prussian Blue (#1D3557). oklch(32.6% 0.071 285), rgb(49, 46, 87).
Aa
White text reads best on this color (12.65:1).
About this color
#312E57 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.071 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.034 away. White text reads best on it, at 12.65:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.65:1 |
| White text | 12.65:1 |
Values
| HEX | #312E57 |
| RGB | rgb(49, 46, 87) |
| HSL | hsl(244, 31%, 26%) |
| OKLCH | oklch(32.6% 0.071 285) |
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 #312E57 | 12.65:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #312E57 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #312E57 text on white | 12.65:1 | AAA | Lc 98.6 | Preferred for body text |
| #312E57 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BCBCE3
oklch(80.8% 0.055 285.1)
-
Step 400
400
#9B99D4
oklch(70.7% 0.086 285.5)
-
Step 500
500
#837FC9
oklch(63.1% 0.11 285.3)
-
Step 600
600
#6D68B6
oklch(55.7% 0.119 284.8)
-
Step 700
700
#5B569C
oklch(49.1% 0.11 284.8)
-
Step 800
800
#4A467F
oklch(42.6% 0.093 284.9)
-
Step 900
900 (this color)
#312E57
oklch(32.6% 0.071 285)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#312E57 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) | #1F3459 | 0.030 |
| Deuteranopia (no green cones) | #1E3256 | 0.030 |
| Tritanopia (no blue cones) | #26363E | 0.061 |
| Achromatopsia (no color) | #333333 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312E57
#312E57
oklch(32.6% 0.071 285)
- #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 #312E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.053
- Marine #042E60 ΔE 0.054
- Marine Blue #01386A ΔE 0.058
- Onyx #343A40 ΔE 0.064
- Midnight Green #073B4C ΔE 0.065
Use #312E57 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.