#323A66
Closest named color: Prussian Blue (#1D3557). oklch(36.4% 0.076 274.2), rgb(50, 58, 102).
Aa
White text reads best on this color (10.86:1).
About this color
#323A66 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.076 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.043 away. White text reads best on it, at 10.86:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.93:1 |
| White text | 10.86:1 |
Values
| HEX | #323A66 |
| RGB | rgb(50, 58, 102) |
| HSL | hsl(231, 34%, 30%) |
| OKLCH | oklch(36.4% 0.076 274.2) |
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 #323A66 | 10.86:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #323A66 | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #323A66 text on white | 10.86:1 | AAA | Lc 95.1 | Preferred for body text |
| #323A66 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B5BFE6
oklch(81% 0.056 273.8)
-
Step 400
400
#8F9CDA
oklch(70.6% 0.092 274.7)
-
Step 500
500
#7483D0
oklch(63.1% 0.117 274.2)
-
Step 600
600
#5D6BBD
oklch(55.5% 0.128 274.2)
-
Step 700
700
#4D59A3
oklch(49.1% 0.119 274.3)
-
Step 800
800
#3F4984
oklch(42.7% 0.098 274.2)
-
Step 900
900 (this color)
#323A66
oklch(36.4% 0.076 274.2)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#323A66 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) | #293F68 | 0.018 |
| Deuteranopia (no green cones) | #243B65 | 0.019 |
| Tritanopia (no blue cones) | #1E434B | 0.067 |
| Achromatopsia (no color) | #3D3D3D | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #323A66
#323A66
oklch(36.4% 0.076 274.2)
- #4B3D00
#4B3D00
oklch(36.4% 0.075 94.3)
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 #323A66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- Marine Blue #01386A ΔE 0.048
- Twilight Blue #0A437A ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.054
- Charcoal #264653 ΔE 0.058
- Marine #042E60 ΔE 0.067
- Midnight Green #073B4C ΔE 0.067
Use #323A66 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.