#312B7B
Closest named color: Midnight Blue (#191970). oklch(34.8% 0.131 280.5), rgb(49, 43, 123).
Aa
White text reads best on this color (11.91:1).
About this color
#312B7B is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.131 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.064 away. White text reads best on it, at 11.91:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #312B7B |
| RGB | rgb(49, 43, 123) |
| HSL | hsl(245, 48%, 33%) |
| OKLCH | oklch(34.8% 0.131 280.5) |
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 #312B7B | 11.91:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #312B7B | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #312B7B text on white | 11.91:1 | AAA | Lc 96.9 | Preferred for body text |
| #312B7B 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FD
oklch(88.5% 0.054 280.6)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#9093FF
oklch(70.8% 0.156 280.4)
-
Step 500
500
#7873FE
oklch(63.2% 0.201 280.6)
-
Step 600
600
#6356ED
oklch(55.6% 0.218 280.5)
-
Step 700
700
#5345CE
oklch(49.1% 0.202 280.5)
-
Step 800
800
#433AA7
oklch(42.7% 0.168 280.3)
-
Step 900
900 (this color)
#312B7B
oklch(34.8% 0.131 280.5)
-
Step 950
950
#201F4D
oklch(26.9% 0.083 280.3)
#312B7B 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) | #003A7E | 0.054 |
| Deuteranopia (no green cones) | #003479 | 0.050 |
| Tritanopia (no blue cones) | #043F4E | 0.113 |
| Achromatopsia (no color) | #373737 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312B7B
#312B7B
oklch(34.8% 0.131 280.5)
- #433A00
#433A00
oklch(34.7% 0.072 99.5)
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 #312B7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.064
- Marine Blue #01386A ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.068
- Twilight Blue #0A437A ΔE 0.070
- Marine #042E60 ΔE 0.071
- Indigo #4B0082 ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.076
- Royal #0C1793 ΔE 0.077
Use #312B7B 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.