#312A58
Closest named color: Prussian Blue (#1D3557). oklch(31.8% 0.08 288), rgb(49, 42, 88).
Aa
White text reads best on this color (13.10:1).
About this color
#312A58 is a dark, moderately saturated purple. In OKLCH its lightness is 32%, its chroma 0.080 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.042 away. White text reads best on it, at 13.10:1.
| Hue family | Purples |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.60:1 |
| White text | 13.10:1 |
Values
| HEX | #312A58 |
| RGB | rgb(49, 42, 88) |
| HSL | hsl(249, 35%, 25%) |
| OKLCH | oklch(31.8% 0.08 288) |
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 #312A58 | 13.10:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #312A58 | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #312A58 text on white | 13.10:1 | AAA | Lc 99.3 | Preferred for body text |
| #312A58 text on black | 1.60:1 | 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
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D7D4FB
oklch(88.5% 0.053 288.8)
-
Step 300
300
#BDB7FB
oklch(80.9% 0.095 288.1)
-
Step 400
400
#9D8FF9
oklch(70.7% 0.152 287.9)
-
Step 500
500
#876FF5
oklch(63.1% 0.193 287.8)
-
Step 600
600
#7352E4
oklch(55.6% 0.21 287.9)
-
Step 700
700
#6141C6
oklch(49% 0.195 288)
-
Step 800
800
#4F37A0
oklch(42.7% 0.161 288.1)
-
Step 900
900
#41317F
oklch(37.7% 0.126 288.2)
-
Step 950
950 (this color)
#312A58
oklch(31.8% 0.08 288)
#312A58 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) | #18325A | 0.040 |
| Deuteranopia (no green cones) | #182F57 | 0.038 |
| Tritanopia (no blue cones) | #26333C | 0.067 |
| Achromatopsia (no color) | #313131 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312A58
#312A58
oklch(31.8% 0.08 288)
- #363400
#363400
oklch(31.7% 0.068 107.4)
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 #312A58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.044
- Marine #042E60 ΔE 0.054
- Gunmetal #293241 ΔE 0.055
- Marine Blue #01386A ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.064
- Oxford Blue #1B263B ΔE 0.066
- Midnight Green #073B4C ΔE 0.075
Use #312A58 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.