#143A4F
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.056 236.3), rgb(20, 58, 79).
Aa
White text reads best on this color (12.01:1).
About this color
#143A4F is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.056 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.011 away. White text reads best on it, at 12.01:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.74:1 |
| White text | 12.01:1 |
Values
| HEX | #143A4F |
| RGB | rgb(20, 58, 79) |
| HSL | hsl(201, 60%, 19%) |
| OKLCH | oklch(33.2% 0.056 236.3) |
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 #143A4F | 12.01:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #143A4F | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #143A4F text on white | 12.01:1 | AAA | Lc 97.3 | Preferred for body text |
| #143A4F text on black | 1.74:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C5D9
oklch(80.8% 0.043 237.3)
-
Step 400
400
#77A8C6
oklch(70.8% 0.068 235.9)
-
Step 500
500
#5292B7
oklch(63.2% 0.086 235.7)
-
Step 600
600
#337BA3
oklch(55.5% 0.094 236.4)
-
Step 700
700
#25688C
oklch(49.2% 0.088 236.2)
-
Step 800
800
#215571
oklch(42.8% 0.072 235.6)
-
Step 900
900 (this color)
#143A4F
oklch(33.2% 0.056 236.3)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#143A4F 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) | #303A50 | 0.034 |
| Deuteranopia (no green cones) | #28344F | 0.028 |
| Tritanopia (no blue cones) | #003F41 | 0.037 |
| Achromatopsia (no color) | #363636 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143A4F
#143A4F
oklch(33.2% 0.056 236.3)
- #4C2E17
#4C2E17
oklch(33.3% 0.057 56.7)
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 #143A4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.011
- Dark Blue Grey #1F3B4D ΔE 0.012
- Prussian Blue #1D3557 ΔE 0.026
- Gunmetal #293241 ΔE 0.036
- Onyx #343A40 ΔE 0.046
- Charcoal #264653 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.050
Use #143A4F 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.