#333568
Closest named color: Prussian Blue (#1D3557). oklch(35.5% 0.087 279.3), rgb(51, 53, 104).
Aa
White text reads best on this color (11.35:1).
About this color
#333568 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.087 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.044 away. White text reads best on it, at 11.35:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #333568 |
| RGB | rgb(51, 53, 104) |
| HSL | hsl(238, 34%, 30%) |
| OKLCH | oklch(35.5% 0.087 279.3) |
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 #333568 | 11.35:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #333568 | 1.84:1 | Fails | Lc 7.8 | Not readable |
| #333568 text on white | 11.35:1 | AAA | Lc 96.0 | Preferred for body text |
| #333568 text on black | 1.84:1 | 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
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B7BDEB
oklch(80.9% 0.065 279)
-
Step 400
400
#9399E1
oklch(70.6% 0.105 279.7)
-
Step 500
500
#797FD8
oklch(63.1% 0.133 278.9)
-
Step 600
600
#6366C6
oklch(55.5% 0.146 279.2)
-
Step 700
700
#5354AB
oklch(49% 0.136 279.6)
-
Step 800
800
#44468A
oklch(42.8% 0.11 279.4)
-
Step 900
900 (this color)
#333568
oklch(35.5% 0.087 279.3)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#333568 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) | #203C6A | 0.030 |
| Deuteranopia (no green cones) | #1B3867 | 0.032 |
| Tritanopia (no blue cones) | #204049 | 0.076 |
| Achromatopsia (no color) | #3A3A3A | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333568
#333568
oklch(35.5% 0.087 279.3)
- #453C00
#453C00
oklch(35.5% 0.074 99.8)
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 #333568, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.044
- Marine Blue #01386A ΔE 0.049
- Twilight Blue #0A437A ΔE 0.056
- Marine #042E60 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.070
- Gunmetal #293241 ΔE 0.071
Use #333568 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.