#312B5B
Closest named color: Prussian Blue (#1D3557). oklch(32.2% 0.083 286.5), rgb(49, 43, 91).
Aa
White text reads best on this color (12.90:1).
About this color
#312B5B is a dark, moderately saturated purple. In OKLCH its lightness is 32%, its chroma 0.083 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.041 away. White text reads best on it, at 12.90:1.
| Hue family | Purples |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.90:1 |
Values
| HEX | #312B5B |
| RGB | rgb(49, 43, 91) |
| HSL | hsl(248, 36%, 26%) |
| OKLCH | oklch(32.2% 0.083 286.5) |
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 #312B5B | 12.90:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #312B5B | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #312B5B text on white | 12.90:1 | AAA | Lc 98.9 | Preferred for body text |
| #312B5B text on black | 1.62:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E7FD
oklch(93.5% 0.03 287.9)
-
Step 200
200
#D6D4FC
oklch(88.4% 0.055 287.5)
-
Step 300
300
#BBB7FD
oklch(80.8% 0.098 286.6)
-
Step 400
400
#9A8FFD
oklch(70.7% 0.157 286.2)
-
Step 500
500
#856EFA
oklch(63.1% 0.2 286.7)
-
Step 600
600
#7151E9
oklch(55.6% 0.218 286.7)
-
Step 700
700
#5F40CB
oklch(49.1% 0.203 286.6)
-
Step 800
800
#4D36A4
oklch(42.7% 0.168 286.5)
-
Step 900
900
#3F3182
oklch(37.7% 0.13 286.3)
-
Step 950
950 (this color)
#312B5B
oklch(32.2% 0.083 286.5)
#312B5B 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) | #17335D | 0.040 |
| Deuteranopia (no green cones) | #16305A | 0.039 |
| Tritanopia (no blue cones) | #24353E | 0.071 |
| Achromatopsia (no color) | #323232 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312B5B
#312B5B
oklch(32.2% 0.083 286.5)
- #383500
#383500
oklch(32.2% 0.069 106.2)
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 #312B5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.049
- Marine #042E60 ΔE 0.052
- Gunmetal #293241 ΔE 0.058
- Marine Blue #01386A ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.065
- Oxford Blue #1B263B ΔE 0.071
- Midnight Blue #191970 ΔE 0.074
Use #312B5B 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.