#333763
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.076 277.9), rgb(51, 55, 99).
Aa
White text reads best on this color (11.24:1).
About this color
#333763 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.076 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.039 away. White text reads best on it, at 11.24:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #333763 |
| RGB | rgb(51, 55, 99) |
| HSL | hsl(235, 32%, 29%) |
| OKLCH | oklch(35.6% 0.076 277.9) |
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 #333763 | 11.24:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #333763 | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #333763 text on white | 11.24:1 | AAA | Lc 95.9 | Preferred for body text |
| #333763 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D8EE
oklch(88.6% 0.03 277.6)
-
Step 300
300
#B7BEE6
oklch(80.9% 0.057 277.3)
-
Step 400
400
#939BD9
oklch(70.7% 0.091 278.1)
-
Step 500
500
#7981CF
oklch(63% 0.117 278)
-
Step 600
600
#636ABC
oklch(55.7% 0.126 277.8)
-
Step 700
700
#5258A2
oklch(49.2% 0.117 277.7)
-
Step 800
800
#434883
oklch(42.7% 0.097 277.8)
-
Step 900
900 (this color)
#333763
oklch(35.6% 0.076 277.9)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#333763 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) | #263D65 | 0.023 |
| Deuteranopia (no green cones) | #233962 | 0.023 |
| Tritanopia (no blue cones) | #224048 | 0.067 |
| Achromatopsia (no color) | #3B3B3B | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333763
#333763
oklch(35.6% 0.076 277.9)
- #463C00
#463C00
oklch(35.6% 0.074 98.7)
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 #333763, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.039
- Marine Blue #01386A ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.053
- Twilight Blue #0A437A ΔE 0.057
- Charcoal #264653 ΔE 0.063
- Gunmetal #293241 ΔE 0.063
- Marine #042E60 ΔE 0.063
Use #333763 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.