#243163
Closest named color: Prussian Blue (#1D3557). oklch(33.1% 0.089 270), rgb(36, 49, 99).
Aa
White text reads best on this color (12.39:1).
About this color
#243163 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.089 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.028 away. White text reads best on it, at 12.39:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.39:1 |
Values
| HEX | #243163 |
| RGB | rgb(36, 49, 99) |
| HSL | hsl(228, 47%, 26%) |
| OKLCH | oklch(33.1% 0.089 270) |
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 #243163 | 12.39:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #243163 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #243163 text on white | 12.39:1 | AAA | Lc 98.0 | Preferred for body text |
| #243163 text on black | 1.69:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFED
oklch(80.8% 0.068 269.9)
-
Step 400
400
#869DE4
oklch(70.7% 0.108 269.8)
-
Step 500
500
#6983DC
oklch(63% 0.137 269.8)
-
Step 600
600
#526BCA
oklch(55.7% 0.149 269.9)
-
Step 700
700
#4359AE
oklch(49.2% 0.137 269.8)
-
Step 800
800
#37498D
oklch(42.7% 0.114 269.9)
-
Step 900
900 (this color)
#243163
oklch(33.1% 0.089 270)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#243163 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) | #193765 | 0.020 |
| Deuteranopia (no green cones) | #0E3262 | 0.023 |
| Tritanopia (no blue cones) | #003C45 | 0.077 |
| Achromatopsia (no color) | #343434 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243163
#243163
oklch(33.1% 0.089 270)
- #433300
#433300
oklch(33% 0.067 89.4)
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 #243163, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.028
- Marine Blue #01386A ΔE 0.033
- Marine #042E60 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.061
- Gunmetal #293241 ΔE 0.062
- Midnight Green #073B4C ΔE 0.063
Use #243163 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.