#243169
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.099 270.4), rgb(36, 49, 105).
Aa
White text reads best on this color (12.22:1).
About this color
#243169 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.099 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.032 away. White text reads best on it, at 12.22:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.71:1 |
| White text | 12.22:1 |
Values
| HEX | #243169 |
| RGB | rgb(36, 49, 105) |
| HSL | hsl(229, 49%, 28%) |
| OKLCH | oklch(33.5% 0.099 270.4) |
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 #243169 | 12.22:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #243169 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #243169 text on white | 12.22:1 | AAA | Lc 97.6 | Preferred for body text |
| #243169 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
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED8F5
oklch(88.4% 0.041 270.4)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#849CEB
oklch(70.7% 0.119 270.3)
-
Step 500
500
#6781E4
oklch(63% 0.152 270.5)
-
Step 600
600
#5068D2
oklch(55.5% 0.165 270.6)
-
Step 700
700
#4156B6
oklch(49% 0.153 270.5)
-
Step 800
800
#364794
oklch(42.7% 0.128 270.8)
-
Step 900
900 (this color)
#243169
oklch(33.5% 0.099 270.4)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#243169 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) | #12386B | 0.025 |
| Deuteranopia (no green cones) | #023268 | 0.030 |
| Tritanopia (no blue cones) | #003E48 | 0.084 |
| Achromatopsia (no color) | #353535 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243169
#243169
oklch(33.5% 0.099 270.4)
- #443500
#443500
oklch(33.6% 0.069 91.2)
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 #243169, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.037
- Marine #042E60 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.064
- Midnight Blue #191970 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.069
- Midnight Green #073B4C ΔE 0.071
Use #243169 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.