#313765
Closest named color: Prussian Blue (#1D3557). oklch(35.5% 0.08 276), rgb(49, 55, 101).
Aa
White text reads best on this color (11.26:1).
About this color
#313765 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.080 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.038 away. White text reads best on it, at 11.26:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #313765 |
| RGB | rgb(49, 55, 101) |
| HSL | hsl(233, 35%, 29%) |
| OKLCH | oklch(35.5% 0.08 276) |
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 #313765 | 11.26:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #313765 | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #313765 text on white | 11.26:1 | AAA | Lc 95.9 | Preferred for body text |
| #313765 text on black | 1.86:1 | 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
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE8
oklch(80.9% 0.06 276.5)
-
Step 400
400
#909CDC
oklch(70.8% 0.095 275.6)
-
Step 500
500
#7682D3
oklch(63.2% 0.122 275.9)
-
Step 600
600
#5F6AC0
oklch(55.6% 0.133 275.7)
-
Step 700
700
#4F58A5
oklch(49.1% 0.122 275.9)
-
Step 800
800
#414886
oklch(42.7% 0.102 276.3)
-
Step 900
900 (this color)
#313765
oklch(35.5% 0.08 276)
-
Step 950
950
#20243F
oklch(27.1% 0.05 276.1)
#313765 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) | #253D67 | 0.022 |
| Deuteranopia (no green cones) | #203964 | 0.023 |
| Tritanopia (no blue cones) | #1D4149 | 0.071 |
| Achromatopsia (no color) | #3B3B3B | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313765
#313765
oklch(35.5% 0.08 276)
- #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 #313765, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.038
- Marine Blue #01386A ΔE 0.046
- Twilight Blue #0A437A ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.054
- Marine #042E60 ΔE 0.061
- Charcoal #264653 ΔE 0.064
- Gunmetal #293241 ΔE 0.065
Use #313765 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.