#243554
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.06 261.8), rgb(36, 53, 84).
Aa
White text reads best on this color (12.26:1).
About this color
#243554 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.060 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.26:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.26:1 |
Values
| HEX | #243554 |
| RGB | rgb(36, 53, 84) |
| HSL | hsl(219, 40%, 24%) |
| OKLCH | oklch(33% 0.06 261.8) |
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 #243554 | 12.26:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #243554 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #243554 text on white | 12.26:1 | AAA | Lc 97.9 | Preferred for body text |
| #243554 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B1C1DE
oklch(80.8% 0.045 262.4)
-
Step 400
400
#88A1CE
oklch(70.6% 0.072 262)
-
Step 500
500
#6B89C1
oklch(63% 0.092 262.4)
-
Step 600
600
#5273AE
oklch(55.7% 0.1 261.4)
-
Step 700
700
#436095
oklch(49.1% 0.092 261.7)
-
Step 800
800
#374E79
oklch(42.6% 0.077 262.2)
-
Step 900
900 (this color)
#243554
oklch(33% 0.06 261.8)
-
Step 950
950
#1C2639
oklch(26.9% 0.038 262.7)
#243554 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) | #293755 | 0.010 |
| Deuteranopia (no green cones) | #233353 | 0.007 |
| Tritanopia (no blue cones) | #0C3C40 | 0.054 |
| Achromatopsia (no color) | #353535 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243554
#243554
oklch(33% 0.06 261.8)
- #45320B
#45320B
oklch(33.1% 0.06 81.4)
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 #243554, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Dark Blue Grey #1F3B4D ΔE 0.026
- Gunmetal #293241 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.036
- Midnight Green #073B4C ΔE 0.037
- Marine Blue #01386A ΔE 0.045
- Marine #042E60 ΔE 0.047
- Onyx #343A40 ΔE 0.049
Use #243554 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.