#143566
Closest named color: Marine Blue (#01386A). oklch(33.4% 0.094 258.4), rgb(20, 53, 102).
Aa
White text reads best on this color (12.13:1).
About this color
#143566 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.094 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 12.13:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.73:1 |
| White text | 12.13:1 |
Values
| HEX | #143566 |
| RGB | rgb(20, 53, 102) |
| HSL | hsl(216, 67%, 24%) |
| OKLCH | oklch(33.4% 0.094 258.4) |
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 #143566 | 12.13:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #143566 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #143566 text on white | 12.13:1 | AAA | Lc 97.4 | Preferred for body text |
| #143566 text on black | 1.73:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2EF
oklch(80.8% 0.071 259.1)
-
Step 400
400
#74A2E7
oklch(70.8% 0.113 258.3)
-
Step 500
500
#4F89E0
oklch(63.2% 0.145 258.3)
-
Step 600
600
#3271CD
oklch(55.6% 0.157 258.2)
-
Step 700
700
#255EB2
oklch(49.2% 0.146 258.5)
-
Step 800
800
#204D90
oklch(42.7% 0.121 258.5)
-
Step 900
900 (this color)
#143566
oklch(33.4% 0.094 258.4)
-
Step 950
950
#132643
oklch(26.9% 0.06 258.6)
#143566 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) | #1C3A68 | 0.018 |
| Deuteranopia (no green cones) | #0A3265 | 0.013 |
| Tritanopia (no blue cones) | #004148 | 0.075 |
| Achromatopsia (no color) | #363636 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143566
#143566
oklch(33.4% 0.094 258.4)
- #4A3100
#4A3100
oklch(33.4% 0.07 77.7)
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 #143566, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Prussian Blue #1D3557 ΔE 0.027
- Marine #042E60 ΔE 0.028
- Twilight Blue #0A437A ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.053
- Midnight Green #073B4C ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.067
- Gunmetal #293241 ΔE 0.067
Use #143566 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.