#333553
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.052 280.3), rgb(51, 53, 83).
Aa
White text reads best on this color (11.83:1).
About this color
#333553 is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.052 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 11.83:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.83:1 |
Values
| HEX | #333553 |
| RGB | rgb(51, 53, 83) |
| HSL | hsl(236, 24%, 26%) |
| OKLCH | oklch(34.1% 0.052 280.3) |
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 #333553 | 11.83:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #333553 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #333553 text on white | 11.83:1 | AAA | Lc 97.1 | Preferred for body text |
| #333553 text on black | 1.77:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BBBEDA
oklch(80.8% 0.039 280.6)
-
Step 400
400
#999DC8
oklch(70.8% 0.063 280.5)
-
Step 500
500
#8084BA
oklch(63.1% 0.081 280.5)
-
Step 600
600
#6A6DA6
oklch(55.6% 0.088 280.8)
-
Step 700
700
#585B8E
oklch(49.1% 0.081 280.4)
-
Step 800
800
#484B73
oklch(42.8% 0.066 279.9)
-
Step 900
900 (this color)
#333553
oklch(34.1% 0.052 280.3)
-
Step 950
950
#232537
oklch(27.1% 0.034 279)
#333553 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) | #2C3954 | 0.015 |
| Deuteranopia (no green cones) | #2A3652 | 0.014 |
| Tritanopia (no blue cones) | #2A3B40 | 0.047 |
| Achromatopsia (no color) | #373737 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333553
#333553
oklch(34.1% 0.052 280.3)
- #3E3916
#3E3916
oklch(34.1% 0.053 101.3)
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 #333553, 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 0.036
- Gunmetal #293241 ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.039
- Onyx #343A40 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.052
- Midnight Green #073B4C ΔE 0.053
- Charcoal #264653 ΔE 0.056
Use #333553 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.