#143E70
Closest named color: Twilight Blue (#0A437A). oklch(36.4% 0.098 255.1), rgb(20, 62, 112).
Aa
White text reads best on this color (10.75:1).
About this color
#143E70 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.098 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 10.75:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #143E70 |
| RGB | rgb(20, 62, 112) |
| HSL | hsl(213, 70%, 26%) |
| OKLCH | oklch(36.4% 0.098 255.1) |
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 #143E70 | 10.75:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #143E70 | 1.95:1 | Fails | Lc 9.3 | Not readable |
| #143E70 text on white | 10.75:1 | AAA | Lc 94.6 | Preferred for body text |
| #143E70 text on black | 1.95:1 | Fails | Lc -8.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C3F0
oklch(80.8% 0.074 255.6)
-
Step 400
400
#6DA3E8
oklch(70.6% 0.117 255.1)
-
Step 500
500
#438AE2
oklch(63% 0.151 255.2)
-
Step 600
600
#2072D0
oklch(55.6% 0.164 255.2)
-
Step 700
700
#115FB4
oklch(49.1% 0.152 255.2)
-
Step 800
800
#134E91
oklch(42.6% 0.125 255)
-
Step 900
900 (this color)
#143E70
oklch(36.4% 0.098 255.1)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#143E70 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) | #254272 | 0.022 |
| Deuteranopia (no green cones) | #143A6F | 0.012 |
| Tritanopia (no blue cones) | #004A51 | 0.075 |
| Achromatopsia (no color) | #3E3E3E | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143E70
#143E70
oklch(36.4% 0.098 255.1)
- #553700
#553700
oklch(36.3% 0.077 75.1)
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 #143E70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.053
- Marine #042E60 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Light Navy #155084 ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.060
Use #143E70 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.