#043754
Closest named color: Prussian Blue (#1D3557). oklch(32.2% 0.072 240.8), rgb(4, 55, 84).
Aa
White text reads best on this color (12.50:1).
About this color
#043754 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.072 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.50:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.50:1 |
Values
| HEX | #043754 |
| RGB | rgb(4, 55, 84) |
| HSL | hsl(202, 91%, 17%) |
| OKLCH | oklch(32.2% 0.072 240.8) |
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 #043754 | 12.50:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #043754 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #043754 text on white | 12.50:1 | AAA | Lc 98.0 | Preferred for body text |
| #043754 text on black | 1.67:1 | 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 950.
-
Step 50
50
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECF9
oklch(93.5% 0.025 242.3)
-
Step 200
200
#BEDEF6
oklch(88.5% 0.047 240.5)
-
Step 300
300
#8EC8F2
oklch(80.8% 0.085 240.6)
-
Step 400
400
#42AAEC
oklch(70.7% 0.135 240.6)
-
Step 500
500
#0092D9
oklch(63.1% 0.147 241)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950 (this color)
#043754
oklch(32.2% 0.072 240.8)
#043754 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) | #293855 | 0.035 |
| Deuteranopia (no green cones) | #1E3153 | 0.026 |
| Tritanopia (no blue cones) | #003E41 | 0.047 |
| Achromatopsia (no color) | #343434 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043754
#043754
oklch(32.2% 0.072 240.8)
- #4D2904
#4D2904
oklch(32.2% 0.071 60.2)
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 #043754, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.030
- Marine Blue #01386A ΔE 0.039
- Marine #042E60 ΔE 0.039
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.051
- Charcoal #264653 ΔE 0.062
Use #043754 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.