#143563
Closest named color: Marine Blue (#01386A). oklch(33.2% 0.09 257.4), rgb(20, 53, 99).
Aa
White text reads best on this color (12.21:1).
About this color
#143563 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.090 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.016 away. White text reads best on it, at 12.21:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.71:1 |
| White text | 12.21:1 |
Values
| HEX | #143563 |
| RGB | rgb(20, 53, 99) |
| HSL | hsl(215, 66%, 23%) |
| OKLCH | oklch(33.2% 0.09 257.4) |
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 #143563 | 12.21:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #143563 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #143563 text on white | 12.21:1 | AAA | Lc 97.6 | Preferred for body text |
| #143563 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF2
oklch(88.6% 0.037 256)
-
Step 300
300
#A6C3ED
oklch(81% 0.068 257.6)
-
Step 400
400
#75A2E3
oklch(70.6% 0.108 257.5)
-
Step 500
500
#508ADB
oklch(63.1% 0.137 257.1)
-
Step 600
600
#3372C9
oklch(55.6% 0.15 257.3)
-
Step 700
700
#265FAE
oklch(49.1% 0.139 257.5)
-
Step 800
800
#214E8D
oklch(42.8% 0.116 257.5)
-
Step 900
900 (this color)
#143563
oklch(33.2% 0.09 257.4)
-
Step 950
950
#132742
oklch(27.1% 0.057 256.4)
#143563 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) | #1E3965 | 0.017 |
| Deuteranopia (no green cones) | #0F3262 | 0.011 |
| Tritanopia (no blue cones) | #004047 | 0.070 |
| Achromatopsia (no color) | #353535 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143563
#143563
oklch(33.2% 0.09 257.4)
- #493000
#493000
oklch(33.1% 0.069 77.3)
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 #143563, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.023
- Marine #042E60 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
- Twilight Blue #0A437A ΔE 0.053
- Gunmetal #293241 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.063
Use #143563 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.