#33396B
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.086 276.1), rgb(51, 57, 107).
Aa
White text reads best on this color (10.83:1).
About this color
#33396B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.086 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.048 away. White text reads best on it, at 10.83:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #33396B |
| RGB | rgb(51, 57, 107) |
| HSL | hsl(234, 35%, 31%) |
| OKLCH | oklch(36.6% 0.086 276.1) |
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 #33396B | 10.83:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #33396B | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #33396B text on white | 10.83:1 | AAA | Lc 95.0 | Preferred for body text |
| #33396B text on black | 1.93:1 | Fails | Lc -7.7 | 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
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEB
oklch(81% 0.064 276)
-
Step 400
400
#8F9BE1
oklch(70.7% 0.103 276)
-
Step 500
500
#7581D8
oklch(63.2% 0.131 276)
-
Step 600
600
#5E68C5
oklch(55.5% 0.143 276.1)
-
Step 700
700
#4E56AB
oklch(49.1% 0.134 276.2)
-
Step 800
800
#40478A
oklch(42.7% 0.11 276.2)
-
Step 900
900 (this color)
#33396B
oklch(36.6% 0.086 276.1)
-
Step 950
950
#1F2341
oklch(26.9% 0.056 276.2)
#33396B 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) | #24406D | 0.026 |
| Deuteranopia (no green cones) | #1F3B6A | 0.026 |
| Tritanopia (no blue cones) | #1D444C | 0.077 |
| Achromatopsia (no color) | #3D3D3D | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33396B
#33396B
oklch(36.6% 0.086 276.1)
- #4A3E00
#4A3E00
oklch(36.5% 0.075 96.7)
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 #33396B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.049
- Marine Blue #01386A ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Charcoal #264653 ΔE 0.067
- Marine #042E60 ΔE 0.068
Use #33396B 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.