#243D67
Closest named color: Marine Blue (#01386A). oklch(36.2% 0.079 260.2), rgb(36, 61, 103).
Aa
White text reads best on this color (10.83:1).
About this color
#243D67 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.079 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.034 away. White text reads best on it, at 10.83:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #243D67 |
| RGB | rgb(36, 61, 103) |
| HSL | hsl(218, 48%, 27%) |
| OKLCH | oklch(36.2% 0.079 260.2) |
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 #243D67 | 10.83:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #243D67 | 1.93:1 | Fails | Lc 9.0 | Not readable |
| #243D67 text on white | 10.83:1 | AAA | Lc 94.9 | Preferred for body text |
| #243D67 text on black | 1.93:1 | Fails | Lc -7.7 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ABC2E8
oklch(81% 0.06 260.4)
-
Step 400
400
#7EA1DC
oklch(70.6% 0.095 260.6)
-
Step 500
500
#5D89D3
oklch(63.1% 0.122 260.3)
-
Step 600
600
#4372C0
oklch(55.7% 0.132 260)
-
Step 700
700
#355FA6
oklch(49.2% 0.123 260.2)
-
Step 800
800
#2C4E86
oklch(42.8% 0.101 259.9)
-
Step 900
900 (this color)
#243D67
oklch(36.2% 0.079 260.2)
-
Step 950
950
#18263F
oklch(27% 0.051 261.4)
#243D67 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) | #2B4169 | 0.016 |
| Deuteranopia (no green cones) | #223A66 | 0.010 |
| Tritanopia (no blue cones) | #00464D | 0.066 |
| Achromatopsia (no color) | #3D3D3D | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243D67
#243D67
oklch(36.2% 0.079 260.2)
- #523800
#523800
oklch(36.1% 0.075 79.6)
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 #243D67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.046
- Charcoal #264653 ΔE 0.051
- Midnight Green #073B4C ΔE 0.056
- Marine #042E60 ΔE 0.059
Use #243D67 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.