#143D67
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.086 252), rgb(20, 61, 103).
Aa
White text reads best on this color (11.09:1).
About this color
#143D67 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.086 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.022 away. White text reads best on it, at 11.09:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.89:1 |
| White text | 11.09:1 |
Values
| HEX | #143D67 |
| RGB | rgb(20, 61, 103) |
| HSL | hsl(210, 67%, 24%) |
| OKLCH | oklch(35.5% 0.086 252) |
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 #143D67 | 11.09:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #143D67 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #143D67 text on white | 11.09:1 | AAA | Lc 95.3 | Preferred for body text |
| #143D67 text on black | 1.89:1 | Fails | Lc -7.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A3C4EA
oklch(80.9% 0.065 252.2)
-
Step 400
400
#70A4DF
oklch(70.6% 0.103 252.4)
-
Step 500
500
#488DD6
oklch(63.2% 0.131 251.8)
-
Step 600
600
#2675C4
oklch(55.6% 0.144 252.2)
-
Step 700
700
#1762A9
oklch(49.1% 0.133 251.9)
-
Step 800
800
#175089
oklch(42.6% 0.111 252.2)
-
Step 900
900 (this color)
#143D67
oklch(35.5% 0.086 252)
-
Step 950
950
#112840
oklch(27.1% 0.054 251.3)
#143D67 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) | #294069 | 0.025 |
| Deuteranopia (no green cones) | #1C3866 | 0.016 |
| Tritanopia (no blue cones) | #00474D | 0.064 |
| Achromatopsia (no color) | #3C3C3C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143D67
#143D67
oklch(35.5% 0.086 252)
- #543400
#543400
oklch(35.5% 0.076 71.8)
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 #143D67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.022
- Prussian Blue #1D3557 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
- Midnight Green #073B4C ΔE 0.049
- Marine #042E60 ΔE 0.050
- Charcoal #264653 ΔE 0.054
Use #143D67 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.