#333555
Closest named color: Prussian Blue (#1D3557). oklch(34.2% 0.056 280.3), rgb(51, 53, 85).
Aa
White text reads best on this color (11.78:1).
About this color
#333555 is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.056 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 11.78:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.78:1 |
| White text | 11.78:1 |
Values
| HEX | #333555 |
| RGB | rgb(51, 53, 85) |
| HSL | hsl(236, 25%, 27%) |
| OKLCH | oklch(34.2% 0.056 280.3) |
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 #333555 | 11.78:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #333555 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #333555 text on white | 11.78:1 | AAA | Lc 97.0 | Preferred for body text |
| #333555 text on black | 1.78:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E9
oklch(88.6% 0.023 280.6)
-
Step 300
300
#BBBEDC
oklch(80.9% 0.042 280.9)
-
Step 400
400
#989CCA
oklch(70.6% 0.067 280.6)
-
Step 500
500
#7F84BD
oklch(63.2% 0.086 279.8)
-
Step 600
600
#696DA9
oklch(55.7% 0.093 280)
-
Step 700
700
#575A91
oklch(49% 0.088 280.3)
-
Step 800
800
#484A76
oklch(42.7% 0.073 280.9)
-
Step 900
900 (this color)
#333555
oklch(34.2% 0.056 280.3)
-
Step 950
950
#232438
oklch(26.9% 0.037 281.4)
#333555 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) | #2B3956 | 0.016 |
| Deuteranopia (no green cones) | #293654 | 0.016 |
| Tritanopia (no blue cones) | #293B41 | 0.048 |
| Achromatopsia (no color) | #383838 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333555
#333555
oklch(34.2% 0.056 280.3)
- #3F3913
#3F3913
oklch(34.2% 0.056 100.4)
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 #333555, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.038
- Gunmetal #293241 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.042
- Onyx #343A40 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.053
- Midnight Green #073B4C ΔE 0.054
- Charcoal #264653 ΔE 0.057
Use #333555 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.