#313763
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.076 275.9), rgb(49, 55, 99).
Aa
White text reads best on this color (11.30:1).
About this color
#313763 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.076 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.036 away. White text reads best on it, at 11.30:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #313763 |
| RGB | rgb(49, 55, 99) |
| HSL | hsl(233, 34%, 29%) |
| OKLCH | oklch(35.4% 0.076 275.9) |
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 #313763 | 11.30:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #313763 | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #313763 text on white | 11.30:1 | AAA | Lc 96.0 | Preferred for body text |
| #313763 text on black | 1.85:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B6BEE6
oklch(80.9% 0.057 276.2)
-
Step 400
400
#919CDA
oklch(70.8% 0.092 276.1)
-
Step 500
500
#7682D0
oklch(63% 0.118 275.8)
-
Step 600
600
#606ABD
oklch(55.5% 0.128 276.2)
-
Step 700
700
#4F58A3
oklch(49% 0.119 275.9)
-
Step 800
800
#414984
oklch(42.8% 0.098 275.7)
-
Step 900
900 (this color)
#313763
oklch(35.4% 0.076 275.9)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#313763 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) | #263D65 | 0.021 |
| Deuteranopia (no green cones) | #223862 | 0.021 |
| Tritanopia (no blue cones) | #1E4048 | 0.067 |
| Achromatopsia (no color) | #3A3A3A | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313763
#313763
oklch(35.4% 0.076 275.9)
- #473B00
#473B00
oklch(35.4% 0.073 96.2)
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 #313763, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.036
- Marine Blue #01386A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.053
- Twilight Blue #0A437A ΔE 0.056
- Marine #042E60 ΔE 0.060
- Gunmetal #293241 ΔE 0.062
- Charcoal #264653 ΔE 0.062
Use #313763 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.