#312D6F
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.111 281.5), rgb(49, 45, 111).
Aa
White text reads best on this color (12.10:1).
About this color
#312D6F is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.111 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.054 away. White text reads best on it, at 12.10:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.73:1 |
| White text | 12.10:1 |
Values
| HEX | #312D6F |
| RGB | rgb(49, 45, 111) |
| HSL | hsl(244, 42%, 31%) |
| OKLCH | oklch(34.1% 0.111 281.5) |
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 #312D6F | 12.10:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #312D6F | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #312D6F text on white | 12.10:1 | AAA | Lc 97.4 | Preferred for body text |
| #312D6F 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D3D6F8
oklch(88.5% 0.047 281.4)
-
Step 300
300
#B7BBF6
oklch(81% 0.083 281.3)
-
Step 400
400
#9395F1
oklch(70.6% 0.133 281.5)
-
Step 500
500
#7B78EC
oklch(63.1% 0.17 281.5)
-
Step 600
600
#665EDA
oklch(55.7% 0.184 281.5)
-
Step 700
700
#554CBD
oklch(49% 0.171 281.6)
-
Step 800
800
#453F99
oklch(42.6% 0.142 281.5)
-
Step 900
900 (this color)
#312D6F
oklch(34.1% 0.111 281.5)
-
Step 950
950
#212147
oklch(27% 0.069 280.7)
#312D6F 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) | #003871 | 0.052 |
| Deuteranopia (no green cones) | #00346E | 0.051 |
| Tritanopia (no blue cones) | #163C49 | 0.095 |
| Achromatopsia (no color) | #363636 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312D6F
#312D6F
oklch(34.1% 0.111 281.5)
- #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 #312D6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.058
- Marine #042E60 ΔE 0.059
- Midnight Blue #191970 ΔE 0.066
- Twilight Blue #0A437A ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.081
- Dark Blue Grey #1F3B4D ΔE 0.083
Use #312D6F 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.