#143751
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.061 243.9), rgb(20, 55, 81).
Aa
White text reads best on this color (12.38:1).
About this color
#143751 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.061 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 12.38:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.38:1 |
Values
| HEX | #143751 |
| RGB | rgb(20, 55, 81) |
| HSL | hsl(206, 60%, 20%) |
| OKLCH | oklch(32.5% 0.061 243.9) |
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 #143751 | 12.38:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #143751 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #143751 text on white | 12.38:1 | AAA | Lc 98.0 | Preferred for body text |
| #143751 text on black | 1.69:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDBE9
oklch(88.4% 0.026 244.5)
-
Step 300
300
#A8C5DD
oklch(81% 0.046 243.3)
-
Step 400
400
#79A6CC
oklch(70.7% 0.074 244.6)
-
Step 500
500
#5490BE
oklch(63.2% 0.094 243.2)
-
Step 600
600
#3779AB
oklch(55.6% 0.103 244.1)
-
Step 700
700
#296692
oklch(49.2% 0.094 243.4)
-
Step 800
800
#235377
oklch(42.7% 0.079 244)
-
Step 900
900 (this color)
#143751
oklch(32.5% 0.061 243.9)
-
Step 950
950
#152838
oklch(26.9% 0.039 245.4)
#143751 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) | #2B3852 | 0.028 |
| Deuteranopia (no green cones) | #233251 | 0.021 |
| Tritanopia (no blue cones) | #003D40 | 0.044 |
| Achromatopsia (no color) | #343434 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143751
#143751
oklch(32.5% 0.061 243.9)
- #4A2C0D
#4A2C0D
oklch(32.4% 0.062 62.9)
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 #143751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Midnight Green #073B4C ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.021
- Gunmetal #293241 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.043
- Marine Blue #01386A ΔE 0.044
- Marine #042E60 ΔE 0.045
- Onyx #343A40 ΔE 0.052
Use #143751 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.