#33396E
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.091 276.1), rgb(51, 57, 110).
Aa
White text reads best on this color (10.76:1).
About this color
#33396E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.046 away. White text reads best on it, at 10.76:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.76:1 |
Values
| HEX | #33396E |
| RGB | rgb(51, 57, 110) |
| HSL | hsl(234, 37%, 32%) |
| OKLCH | oklch(36.8% 0.091 276.1) |
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 #33396E | 10.76:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #33396E | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #33396E text on white | 10.76:1 | AAA | Lc 94.8 | Preferred for body text |
| #33396E text on black | 1.95:1 | Fails | Lc -7.8 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BEED
oklch(81% 0.067 275.4)
-
Step 400
400
#8E9AE4
oklch(70.6% 0.109 276.2)
-
Step 500
500
#7480DC
oklch(63.2% 0.138 276.1)
-
Step 600
600
#5E67CA
oklch(55.6% 0.151 276.4)
-
Step 700
700
#4D55AE
oklch(49% 0.14 276.1)
-
Step 800
800
#3F468D
oklch(42.6% 0.116 276.1)
-
Step 900
900 (this color)
#33396E
oklch(36.8% 0.091 276.1)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#33396E 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) | #224070 | 0.027 |
| Deuteranopia (no green cones) | #1C3B6D | 0.029 |
| Tritanopia (no blue cones) | #1A444E | 0.079 |
| Achromatopsia (no color) | #3E3E3E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33396E
#33396E
oklch(36.8% 0.091 276.1)
- #4B3E00
#4B3E00
oklch(36.7% 0.075 95.6)
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 #33396E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.046
- Marine Blue #01386A ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Cobalt #1E488F ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.067
- Marine #042E60 ΔE 0.070
Use #33396E 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.