#312F6F
Closest named color: Marine Blue (#01386A). oklch(34.5% 0.108 280.6), rgb(49, 47, 111).
Aa
White text reads best on this color (11.88:1).
About this color
#312F6F is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.108 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.052 away. White text reads best on it, at 11.88:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.88:1 |
Values
| HEX | #312F6F |
| RGB | rgb(49, 47, 111) |
| HSL | hsl(242, 41%, 31%) |
| OKLCH | oklch(34.5% 0.108 280.6) |
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 #312F6F | 11.88:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #312F6F | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #312F6F text on white | 11.88:1 | AAA | Lc 97.0 | Preferred for body text |
| #312F6F text on black | 1.76:1 | 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
#E6E8FA
oklch(93.5% 0.024 280.9)
-
Step 200
200
#D3D6F7
oklch(88.4% 0.045 281.3)
-
Step 300
300
#B6BBF4
oklch(80.8% 0.081 280.5)
-
Step 400
400
#9296EF
oklch(70.7% 0.129 280.6)
-
Step 500
500
#7979EA
oklch(63% 0.166 280.5)
-
Step 600
600
#645FD8
oklch(55.5% 0.18 280.6)
-
Step 700
700
#534EBB
oklch(49.1% 0.166 280.4)
-
Step 800
800
#444197
oklch(42.8% 0.137 280.5)
-
Step 900
900 (this color)
#312F6F
oklch(34.5% 0.108 280.6)
-
Step 950
950
#212147
oklch(27% 0.069 280.7)
#312F6F 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) | #073A71 | 0.048 |
| Deuteranopia (no green cones) | #00356E | 0.049 |
| Tritanopia (no blue cones) | #163E4A | 0.093 |
| Achromatopsia (no color) | #373737 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312F6F
#312F6F
oklch(34.5% 0.108 280.6)
- #423A00
#423A00
oklch(34.6% 0.072 100.7)
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 #312F6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
- Marine #042E60 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.063
- Midnight Blue #191970 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.072
- Dark Blue Grey #1F3B4D ΔE 0.080
- Space Cadet #2B2D42 ΔE 0.081
Use #312F6F 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.