#31315C
Closest named color: Prussian Blue (#1D3557). oklch(33.6% 0.075 281.6), rgb(49, 49, 92).
Aa
White text reads best on this color (12.17:1).
About this color
#31315C is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.075 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.032 away. White text reads best on it, at 12.17:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.72:1 |
| White text | 12.17:1 |
Values
| HEX | #31315C |
| RGB | rgb(49, 49, 92) |
| HSL | hsl(240, 30%, 28%) |
| OKLCH | oklch(33.6% 0.075 281.6) |
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 #31315C | 12.17:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #31315C | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #31315C text on white | 12.17:1 | AAA | Lc 97.7 | Preferred for body text |
| #31315C text on black | 1.72:1 | 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
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EE
oklch(88.5% 0.032 281.8)
-
Step 300
300
#BABDE5
oklch(80.9% 0.056 281.7)
-
Step 400
400
#979AD7
oklch(70.7% 0.089 281.7)
-
Step 500
500
#7E80CD
oklch(63.1% 0.115 281.4)
-
Step 600
600
#6868BA
oklch(55.6% 0.125 281.5)
-
Step 700
700
#5756A0
oklch(49% 0.116 281.8)
-
Step 800
800
#474782
oklch(42.7% 0.096 281.5)
-
Step 900
900 (this color)
#31315C
oklch(33.6% 0.075 281.6)
-
Step 950
950
#23233D
oklch(27% 0.048 282.7)
#31315C 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) | #21375E | 0.027 |
| Deuteranopia (no green cones) | #1E345B | 0.028 |
| Tritanopia (no blue cones) | #233A42 | 0.065 |
| Achromatopsia (no color) | #353535 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31315C
#31315C
oklch(33.6% 0.075 281.6)
- #3F3800
#3F3800
oklch(33.7% 0.071 101.6)
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 #31315C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.052
- Marine Blue #01386A ΔE 0.052
- Gunmetal #293241 ΔE 0.052
- Marine #042E60 ΔE 0.054
- Midnight Green #073B4C ΔE 0.064
- Onyx #343A40 ΔE 0.065
Use #31315C 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.