#303168
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.094 279.4), rgb(48, 49, 104).
Aa
White text reads best on this color (11.89:1).
About this color
#303168 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.094 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.043 away. White text reads best on it, at 11.89:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.89:1 |
Values
| HEX | #303168 |
| RGB | rgb(48, 49, 104) |
| HSL | hsl(239, 37%, 30%) |
| OKLCH | oklch(34.3% 0.094 279.4) |
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 #303168 | 11.89:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #303168 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #303168 text on white | 11.89:1 | AAA | Lc 97.1 | Preferred for body text |
| #303168 text on black | 1.76:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D3D7F3
oklch(88.5% 0.039 279.1)
-
Step 300
300
#B7BCEE
oklch(80.8% 0.071 280.2)
-
Step 400
400
#9299E6
oklch(70.8% 0.112 279.1)
-
Step 500
500
#797DDE
oklch(63.1% 0.144 279.6)
-
Step 600
600
#6364CC
oklch(55.5% 0.157 279.6)
-
Step 700
700
#5253B0
oklch(49.1% 0.145 279.2)
-
Step 800
800
#43448F
oklch(42.7% 0.121 279.4)
-
Step 900
900 (this color)
#303168
oklch(34.3% 0.094 279.4)
-
Step 950
950
#212243
oklch(26.9% 0.061 280.2)
#303168 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) | #17396A | 0.035 |
| Deuteranopia (no green cones) | #113567 | 0.038 |
| Tritanopia (no blue cones) | #193D47 | 0.082 |
| Achromatopsia (no color) | #373737 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303168
#303168
oklch(34.3% 0.094 279.4)
- #423900
#423900
oklch(34.4% 0.071 99.4)
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 #303168, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.043
- Marine Blue #01386A ΔE 0.047
- Marine #042E60 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.068
- Gunmetal #293241 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.073
Use #303168 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.