#243766
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.086 265.6), rgb(36, 55, 102).
Aa
White text reads best on this color (11.58:1).
About this color
#243766 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.086 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.028 away. White text reads best on it, at 11.58:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.58:1 |
Values
| HEX | #243766 |
| RGB | rgb(36, 55, 102) |
| HSL | hsl(223, 48%, 27%) |
| OKLCH | oklch(34.7% 0.086 265.6) |
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 #243766 | 11.58:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #243766 | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #243766 text on white | 11.58:1 | AAA | Lc 96.5 | Preferred for body text |
| #243766 text on black | 1.81:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ADC0EB
oklch(80.8% 0.065 266.3)
-
Step 400
400
#829FE1
oklch(70.7% 0.103 265.7)
-
Step 500
500
#6386D9
oklch(63.1% 0.132 265.5)
-
Step 600
600
#4B6EC6
oklch(55.6% 0.142 265.7)
-
Step 700
700
#3C5BAB
oklch(49% 0.133 265.8)
-
Step 800
800
#324B8B
oklch(42.7% 0.11 265.9)
-
Step 900
900 (this color)
#243766
oklch(34.7% 0.086 265.6)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#243766 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) | #223C68 | 0.015 |
| Deuteranopia (no green cones) | #183665 | 0.014 |
| Tritanopia (no blue cones) | #004249 | 0.075 |
| Achromatopsia (no color) | #393939 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243766
#243766
oklch(34.7% 0.086 265.6)
- #4A3600
#4A3600
oklch(34.6% 0.071 85.5)
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 #243766, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.056
- Midnight Green #073B4C ΔE 0.058
- Gunmetal #293241 ΔE 0.064
Use #243766 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.