#143183
Closest named color: Marine Blue (#01386A). oklch(35% 0.142 264.8), rgb(20, 49, 131).
Aa
White text reads best on this color (11.68:1).
About this color
#143183 is a dark, vivid blue. In OKLCH its lightness is 35%, its chroma 0.142 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.049 away. White text reads best on it, at 11.68:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.68:1 |
Values
| HEX | #143183 |
| RGB | rgb(20, 49, 131) |
| HSL | hsl(224, 74%, 30%) |
| OKLCH | oklch(35% 0.142 264.8) |
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 #143183 | 11.68:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #143183 | 1.79:1 | Fails | Lc 7.7 | Not readable |
| #143183 text on white | 11.68:1 | AAA | Lc 96.2 | Preferred for body text |
| #143183 text on black | 1.79:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719CFF
oklch(70.6% 0.153 265)
-
Step 500
500
#4D80FF
oklch(63.2% 0.197 264.8)
-
Step 600
600
#2B60FB
oklch(55.6% 0.237 264.8)
-
Step 700
700
#1F4EDB
oklch(49.2% 0.221 264.7)
-
Step 800
800
#1B41B1
oklch(42.7% 0.183 264.9)
-
Step 900
900 (this color)
#143183
oklch(35% 0.142 264.8)
-
Step 950
950
#102252
oklch(27% 0.091 265.2)
#143183 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) | #003E86 | 0.034 |
| Deuteranopia (no green cones) | #003381 | 0.013 |
| Tritanopia (no blue cones) | #004655 | 0.109 |
| Achromatopsia (no color) | #383838 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143183
#143183
oklch(35% 0.142 264.8)
- #4C3700
#4C3700
oklch(35.1% 0.072 84.7)
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 #143183, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.049
- Twilight Blue #0A437A ΔE 0.053
- Royal #0C1793 ΔE 0.057
- Marine #042E60 ΔE 0.063
- Midnight Blue #191970 ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Sapphire #2138AB ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.079
Use #143183 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.