#312571
Closest named color: Midnight Blue (#191970). oklch(32.8% 0.125 284.3), rgb(49, 37, 113).
Aa
White text reads best on this color (12.85:1).
About this color
#312571 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.125 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.052 away. White text reads best on it, at 12.85:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.63:1 |
| White text | 12.85:1 |
Values
| HEX | #312571 |
| RGB | rgb(49, 37, 113) |
| HSL | hsl(249, 51%, 29%) |
| OKLCH | oklch(32.8% 0.125 284.3) |
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 #312571 | 12.85:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #312571 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #312571 text on white | 12.85:1 | AAA | Lc 98.6 | Preferred for body text |
| #312571 text on black | 1.63:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FB
oklch(88.4% 0.052 284.1)
-
Step 300
300
#B9B9FC
oklch(81% 0.094 284.1)
-
Step 400
400
#9791FA
oklch(70.7% 0.151 284.4)
-
Step 500
500
#8072F7
oklch(63.2% 0.192 284.2)
-
Step 600
600
#6C56E6
oklch(55.7% 0.208 284.3)
-
Step 700
700
#5A44C8
oklch(49% 0.195 284.2)
-
Step 800
800
#4939A1
oklch(42.6% 0.161 284.3)
-
Step 900
900 (this color)
#312571
oklch(32.8% 0.125 284.3)
-
Step 950
950
#231F4B
oklch(27.1% 0.079 283.9)
#312571 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) | #003473 | 0.059 |
| Deuteranopia (no green cones) | #002F6F | 0.056 |
| Tritanopia (no blue cones) | #153847 | 0.106 |
| Achromatopsia (no color) | #323232 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312571
#312571
oklch(32.8% 0.125 284.3)
- #3B3600
#3B3600
oklch(32.8% 0.069 103.8)
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 #312571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.052
- Marine #042E60 ΔE 0.064
- Marine Blue #01386A ΔE 0.067
- Indigo #4B0082 ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.072
- Royal Purple #4B006E ΔE 0.073
- Royal #0C1793 ΔE 0.083
- Twilight Blue #0A437A ΔE 0.084
Use #312571 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.