#312957
Closest named color: Prussian Blue (#1D3557). oklch(31.5% 0.08 289), rgb(49, 41, 87).
Aa
White text reads best on this color (13.24:1).
About this color
#312957 is a dark, moderately saturated purple. In OKLCH its lightness is 31%, its chroma 0.080 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.044 away. White text reads best on it, at 13.24:1.
| Hue family | Purples |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.58:1 |
| White text | 13.24:1 |
Values
| HEX | #312957 |
| RGB | rgb(49, 41, 87) |
| HSL | hsl(250, 36%, 25%) |
| OKLCH | oklch(31.5% 0.08 289) |
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 #312957 | 13.24:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #312957 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #312957 text on white | 13.24:1 | AAA | Lc 99.5 | Preferred for body text |
| #312957 text on black | 1.58:1 | 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 950.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D7D4FB
oklch(88.5% 0.053 288.8)
-
Step 300
300
#BEB7FA
oklch(80.9% 0.094 288.9)
-
Step 400
400
#9F8EF8
oklch(70.6% 0.152 289.3)
-
Step 500
500
#896EF5
oklch(63.1% 0.194 288.8)
-
Step 600
600
#7551E3
oklch(55.5% 0.21 289)
-
Step 700
700
#6340C6
oklch(49.1% 0.197 289.1)
-
Step 800
800
#5036A0
oklch(42.6% 0.163 288.8)
-
Step 900
900
#42317F
oklch(37.8% 0.126 288.9)
-
Step 950
950 (this color)
#312957
oklch(31.5% 0.08 289)
#312957 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) | #173159 | 0.041 |
| Deuteranopia (no green cones) | #172F56 | 0.040 |
| Tritanopia (no blue cones) | #26323B | 0.067 |
| Achromatopsia (no color) | #303030 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312957
#312957
oklch(31.5% 0.08 289)
- #353400
#353400
oklch(31.6% 0.068 108.6)
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 #312957, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.044
- Marine #042E60 ΔE 0.055
- Gunmetal #293241 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.065
- Marine Blue #01386A ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.066
- Midnight Blue #191970 ΔE 0.075
Use #312957 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.