#243752
Closest named color: Prussian Blue (#1D3557). oklch(33.4% 0.054 257.2), rgb(36, 55, 82).
Aa
White text reads best on this color (12.04:1).
About this color
#243752 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.054 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.04:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #243752 |
| RGB | rgb(36, 55, 82) |
| HSL | hsl(215, 39%, 23%) |
| OKLCH | oklch(33.4% 0.054 257.2) |
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 #243752 | 12.04:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #243752 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #243752 text on white | 12.04:1 | AAA | Lc 97.5 | Preferred for body text |
| #243752 text on black | 1.74:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#87A2C9
oklch(70.6% 0.065 257.5)
-
Step 500
500
#698BBB
oklch(63% 0.082 257)
-
Step 600
600
#5175A8
oklch(55.8% 0.09 257.2)
-
Step 700
700
#416290
oklch(49.2% 0.084 256.9)
-
Step 800
800
#365075
oklch(42.8% 0.07 257.2)
-
Step 900
900 (this color)
#243752
oklch(33.4% 0.054 257.2)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#243752 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) | #2C3953 | 0.014 |
| Deuteranopia (no green cones) | #273451 | 0.010 |
| Tritanopia (no blue cones) | #0D3D41 | 0.047 |
| Achromatopsia (no color) | #363636 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243752
#243752
oklch(33.4% 0.054 257.2)
- #463213
#463213
oklch(33.3% 0.054 75.9)
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 #243752, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Dark Blue Grey #1F3B4D ΔE 0.019
- Gunmetal #293241 ΔE 0.031
- Midnight Green #073B4C ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.038
- Onyx #343A40 ΔE 0.042
- Marine Blue #01386A ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
Use #243752 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.