#243264
Closest named color: Prussian Blue (#1D3557). oklch(33.4% 0.09 269.3), rgb(36, 50, 100).
Aa
White text reads best on this color (12.24:1).
About this color
#243264 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.090 and its hue 269°. 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 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #243264 |
| RGB | rgb(36, 50, 100) |
| HSL | hsl(227, 47%, 27%) |
| OKLCH | oklch(33.4% 0.09 269.3) |
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 #243264 | 12.24:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #243264 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #243264 text on white | 12.24:1 | AAA | Lc 97.7 | Preferred for body text |
| #243264 text on black | 1.71:1 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
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
#859DE4
oklch(70.6% 0.108 269.3)
-
Step 500
500
#6883DC
oklch(63% 0.138 269.4)
-
Step 600
600
#516BCA
oklch(55.6% 0.15 269.5)
-
Step 700
700
#4259AF
oklch(49.2% 0.139 269.5)
-
Step 800
800
#36498D
oklch(42.7% 0.115 269.3)
-
Step 900
900 (this color)
#243264
oklch(33.4% 0.09 269.3)
-
Step 950
950
#1B2442
oklch(26.9% 0.057 269.6)
#243264 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) | #1A3866 | 0.019 |
| Deuteranopia (no green cones) | #0F3263 | 0.023 |
| Tritanopia (no blue cones) | #003D46 | 0.077 |
| Achromatopsia (no color) | #353535 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243264
#243264
oklch(33.4% 0.09 269.3)
- #443400
#443400
oklch(33.3% 0.068 89.7)
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 #243264, 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 0.031
- Marine #042E60 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.055
- Twilight Blue #0A437A ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.060
- Midnight Green #073B4C ΔE 0.062
- Gunmetal #293241 ΔE 0.063
Use #243264 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.