#143C76
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.109 258.3), rgb(20, 60, 118).
Aa
White text reads best on this color (10.83:1).
About this color
#143C76 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.109 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.020 away. White text reads best on it, at 10.83:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #143C76 |
| RGB | rgb(20, 60, 118) |
| HSL | hsl(216, 71%, 27%) |
| OKLCH | oklch(36.3% 0.109 258.3) |
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 #143C76 | 10.83:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #143C76 | 1.93:1 | Fails | Lc 9.2 | Not readable |
| #143C76 text on white | 10.83:1 | AAA | Lc 94.7 | Preferred for body text |
| #143C76 text on black | 1.93:1 | Fails | Lc -7.9 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A0C3F6
oklch(81% 0.082 257.7)
-
Step 400
400
#6CA1F1
oklch(70.6% 0.131 258.4)
-
Step 500
500
#4387EC
oklch(63% 0.167 258.3)
-
Step 600
600
#216EDB
oklch(55.5% 0.183 258.4)
-
Step 700
700
#135CBE
oklch(49.2% 0.169 258.1)
-
Step 800
800
#144B9A
oklch(42.6% 0.141 258.6)
-
Step 900
900 (this color)
#143C76
oklch(36.3% 0.109 258.3)
-
Step 950
950
#0F2648
oklch(27.1% 0.07 258.2)
#143C76 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) | #1C4278 | 0.020 |
| Deuteranopia (no green cones) | #013975 | 0.015 |
| Tritanopia (no blue cones) | #004A53 | 0.084 |
| Achromatopsia (no color) | #3D3D3D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143C76
#143C76
oklch(36.3% 0.109 258.3)
- #533800
#533800
oklch(36.3% 0.075 78.5)
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 #143C76, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.020
- Marine Blue #01386A ΔE 0.027
- Cobalt #1E488F ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.055
- Marine #042E60 ΔE 0.057
- Light Navy #155084 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.071
Use #143C76 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.