#333764
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.078 277.8), rgb(51, 55, 100).
Aa
White text reads best on this color (11.22:1).
About this color
#333764 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.078 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.040 away. White text reads best on it, at 11.22:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #333764 |
| RGB | rgb(51, 55, 100) |
| HSL | hsl(235, 32%, 30%) |
| OKLCH | oklch(35.6% 0.078 277.8) |
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 #333764 | 11.22:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #333764 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #333764 text on white | 11.22:1 | AAA | Lc 95.8 | Preferred for body text |
| #333764 text on black | 1.87:1 | 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D8EF
oklch(88.6% 0.032 277.9)
-
Step 300
300
#B7BEE7
oklch(81% 0.058 277.4)
-
Step 400
400
#939BDA
oklch(70.7% 0.092 278.2)
-
Step 500
500
#7981D0
oklch(63.1% 0.119 278)
-
Step 600
600
#6369BD
oklch(55.6% 0.129 278.2)
-
Step 700
700
#5257A3
oklch(49% 0.12 278.1)
-
Step 800
800
#434884
oklch(42.7% 0.099 277.8)
-
Step 900
900 (this color)
#333764
oklch(35.6% 0.078 277.8)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#333764 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) | #263D66 | 0.023 |
| Deuteranopia (no green cones) | #223963 | 0.024 |
| Tritanopia (no blue cones) | #224048 | 0.068 |
| Achromatopsia (no color) | #3B3B3B | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333764
#333764
oklch(35.6% 0.078 277.8)
- #473C00
#473C00
oklch(35.7% 0.074 97.5)
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 #333764, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.040
- Marine Blue #01386A ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.054
- Twilight Blue #0A437A ΔE 0.056
- Marine #042E60 ΔE 0.063
- Charcoal #264653 ΔE 0.064
- Gunmetal #293241 ΔE 0.065
Use #333764 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.