#312E5B
Closest named color: Prussian Blue (#1D3557). oklch(32.8% 0.078 284.3), rgb(49, 46, 91).
Aa
White text reads best on this color (12.55:1).
About this color
#312E5B is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.078 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.035 away. White text reads best on it, at 12.55:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.55:1 |
Values
| HEX | #312E5B |
| RGB | rgb(49, 46, 91) |
| HSL | hsl(244, 33%, 27%) |
| OKLCH | oklch(32.8% 0.078 284.3) |
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 #312E5B | 12.55:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #312E5B | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #312E5B text on white | 12.55:1 | AAA | Lc 98.4 | Preferred for body text |
| #312E5B text on black | 1.67:1 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D6D7EE
oklch(88.5% 0.031 283.8)
-
Step 300
300
#BBBCE6
oklch(80.8% 0.059 283.9)
-
Step 400
400
#9999D9
oklch(70.7% 0.093 283.8)
-
Step 500
500
#827ECF
oklch(63.1% 0.12 284.7)
-
Step 600
600
#6C66BC
oklch(55.6% 0.13 284.5)
-
Step 700
700
#5A55A2
oklch(49.2% 0.12 284)
-
Step 800
800
#494583
oklch(42.5% 0.101 284.2)
-
Step 900
900 (this color)
#312E5B
oklch(32.8% 0.078 284.3)
-
Step 950
950
#24233E
oklch(27.1% 0.05 284.3)
#312E5B 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) | #1D355D | 0.033 |
| Deuteranopia (no green cones) | #1B325A | 0.033 |
| Tritanopia (no blue cones) | #243740 | 0.066 |
| Achromatopsia (no color) | #333333 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312E5B
#312E5B
oklch(32.8% 0.078 284.3)
- #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 #312E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.047
- Marine #042E60 ΔE 0.052
- Gunmetal #293241 ΔE 0.054
- Marine Blue #01386A ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.057
- Midnight Green #073B4C ΔE 0.069
- Onyx #343A40 ΔE 0.070
Use #312E5B 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.