#312F59
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.073 283.8), rgb(49, 47, 89).
Aa
White text reads best on this color (12.48:1).
About this color
#312F59 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.073 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.033 away. White text reads best on it, at 12.48:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.48:1 |
Values
| HEX | #312F59 |
| RGB | rgb(49, 47, 89) |
| HSL | hsl(243, 31%, 27%) |
| OKLCH | oklch(32.9% 0.073 283.8) |
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 #312F59 | 12.48:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #312F59 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #312F59 text on white | 12.48:1 | AAA | Lc 98.3 | Preferred for body text |
| #312F59 text on black | 1.68:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BBBDE4
oklch(81% 0.055 282.8)
-
Step 400
400
#999AD6
oklch(70.8% 0.087 283.2)
-
Step 500
500
#817FCB
oklch(63% 0.113 283.9)
-
Step 600
600
#6B68B7
oklch(55.6% 0.12 283.5)
-
Step 700
700
#5A569E
oklch(49.1% 0.113 284)
-
Step 800
800
#494780
oklch(42.8% 0.093 283.3)
-
Step 900
900 (this color)
#312F59
oklch(32.9% 0.073 283.8)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#312F59 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) | #20355B | 0.028 |
| Deuteranopia (no green cones) | #1E3258 | 0.029 |
| Tritanopia (no blue cones) | #25373F | 0.062 |
| Achromatopsia (no color) | #343434 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312F59
#312F59
oklch(32.9% 0.073 283.8)
- #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 #312F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.043
- Gunmetal #293241 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.053
- Marine #042E60 ΔE 0.053
- Marine Blue #01386A ΔE 0.056
- Onyx #343A40 ΔE 0.065
- Midnight Green #073B4C ΔE 0.065
Use #312F59 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.