#333769
Closest named color: Prussian Blue (#1D3557). oklch(36% 0.086 277.7), rgb(51, 55, 105).
Aa
White text reads best on this color (11.10:1).
About this color
#333769 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.086 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.046 away. White text reads best on it, at 11.10:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #333769 |
| RGB | rgb(51, 55, 105) |
| HSL | hsl(236, 35%, 31%) |
| OKLCH | oklch(36% 0.086 277.7) |
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 #333769 | 11.10:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #333769 | 1.89:1 | Fails | Lc 8.4 | Not readable |
| #333769 text on white | 11.10:1 | AAA | Lc 95.5 | Preferred for body text |
| #333769 text on black | 1.89:1 | 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
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B6BDEA
oklch(80.8% 0.064 277.9)
-
Step 400
400
#919AE0
oklch(70.6% 0.103 277.8)
-
Step 500
500
#7780D7
oklch(63.1% 0.13 277.5)
-
Step 600
600
#6167C5
oklch(55.5% 0.144 277.9)
-
Step 700
700
#5156AA
oklch(49.2% 0.132 277.8)
-
Step 800
800
#42468A
oklch(42.6% 0.111 278.1)
-
Step 900
900 (this color)
#333769
oklch(36% 0.086 277.7)
-
Step 950
950
#202340
oklch(26.9% 0.054 277.6)
#333769 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) | #223E6B | 0.028 |
| Deuteranopia (no green cones) | #1E3A68 | 0.028 |
| Tritanopia (no blue cones) | #1F424B | 0.075 |
| Achromatopsia (no color) | #3C3C3C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333769
#333769
oklch(36% 0.086 277.7)
- #483D00
#483D00
oklch(36.1% 0.074 97.7)
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 #333769, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.046
- Marine Blue #01386A ΔE 0.048
- Twilight Blue #0A437A ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.061
- Marine #042E60 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.069
- Charcoal #264653 ΔE 0.069
Use #333769 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.