#31315A
Closest named color: Prussian Blue (#1D3557). oklch(33.4% 0.071 281.8), rgb(49, 49, 90).
Aa
White text reads best on this color (12.22:1).
About this color
#31315A is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.071 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 12.22:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.22:1 |
Values
| HEX | #31315A |
| RGB | rgb(49, 49, 90) |
| HSL | hsl(240, 29%, 27%) |
| OKLCH | oklch(33.4% 0.071 281.8) |
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 #31315A | 12.22:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #31315A | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #31315A text on white | 12.22:1 | AAA | Lc 97.8 | Preferred for body text |
| #31315A text on black | 1.71:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D7ED
oklch(88.4% 0.03 281.6)
-
Step 300
300
#BABDE3
oklch(80.9% 0.054 281.6)
-
Step 400
400
#989AD5
oklch(70.7% 0.086 282.5)
-
Step 500
500
#7F81CA
oklch(63.2% 0.109 281.6)
-
Step 600
600
#6969B7
oklch(55.7% 0.119 281.8)
-
Step 700
700
#58579D
oklch(49.1% 0.11 282.2)
-
Step 800
800
#47477F
oklch(42.5% 0.092 281.8)
-
Step 900
900 (this color)
#31315A
oklch(33.4% 0.071 281.8)
-
Step 950
950
#23233C
oklch(26.9% 0.046 282.9)
#31315A 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) | #22375C | 0.026 |
| Deuteranopia (no green cones) | #203459 | 0.026 |
| Tritanopia (no blue cones) | #243941 | 0.061 |
| Achromatopsia (no color) | #353535 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31315A
#31315A
oklch(33.4% 0.071 281.8)
- #3E3700
#3E3700
oklch(33.4% 0.07 101.5)
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 #31315A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.049
- Marine Blue #01386A ΔE 0.053
- Marine #042E60 ΔE 0.054
- Onyx #343A40 ΔE 0.062
- Midnight Green #073B4C ΔE 0.062
Use #31315A 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.