#333357
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.063 282.5), rgb(51, 51, 87).
Aa
White text reads best on this color (11.98:1).
About this color
#333357 is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.063 and its hue 283°. 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 11.98:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #333357 |
| RGB | rgb(51, 51, 87) |
| HSL | hsl(240, 26%, 27%) |
| OKLCH | oklch(33.9% 0.063 282.5) |
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 #333357 | 11.98:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #333357 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #333357 text on white | 11.98:1 | AAA | Lc 97.4 | Preferred for body text |
| #333357 text on black | 1.75:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EA
oklch(88.4% 0.026 283.4)
-
Step 300
300
#BBBDDF
oklch(80.8% 0.048 282.6)
-
Step 400
400
#999BCF
oklch(70.7% 0.076 282.6)
-
Step 500
500
#8182C2
oklch(63.2% 0.096 282.6)
-
Step 600
600
#6B6BAE
oklch(55.7% 0.103 282.5)
-
Step 700
700
#595996
oklch(49.2% 0.096 282.3)
-
Step 800
800
#49497A
oklch(42.8% 0.08 282.5)
-
Step 900
900 (this color)
#333357
oklch(33.9% 0.063 282.5)
-
Step 950
950
#232439
oklch(27% 0.039 281.4)
#333357 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) | #273858 | 0.022 |
| Deuteranopia (no green cones) | #253556 | 0.022 |
| Tritanopia (no blue cones) | #293A40 | 0.055 |
| Achromatopsia (no color) | #373737 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333357
#333357
oklch(33.9% 0.063 282.5)
- #3E390B
#3E390B
oklch(34% 0.063 103)
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 #333357, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.044
- Gunmetal #293241 ΔE 0.044
- Onyx #343A40 ΔE 0.053
- Marine Blue #01386A ΔE 0.057
- Midnight Green #073B4C ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.059
Use #333357 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.