#143787
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.14 263.3), rgb(20, 55, 135).
Aa
White text reads best on this color (10.90:1).
About this color
#143787 is a dark, vivid blue. In OKLCH its lightness is 37%, its chroma 0.140 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 10.90:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #143787 |
| RGB | rgb(20, 55, 135) |
| HSL | hsl(222, 74%, 30%) |
| OKLCH | oklch(36.6% 0.14 263.3) |
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 #143787 | 10.90:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #143787 | 1.92:1 | Fails | Lc 9.2 | Not readable |
| #143787 text on white | 10.90:1 | AAA | Lc 94.7 | Preferred for body text |
| #143787 text on black | 1.92:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4781FF
oklch(63.2% 0.197 263.3)
-
Step 600
600
#2262F9
oklch(55.5% 0.234 263.3)
-
Step 700
700
#1650D9
oklch(49.1% 0.217 263.3)
-
Step 800
800
#1443AF
oklch(42.7% 0.179 263.1)
-
Step 900
900 (this color)
#143787
oklch(36.6% 0.14 263.3)
-
Step 950
950
#0E2351
oklch(27% 0.089 263.2)
#143787 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) | #00428A | 0.029 |
| Deuteranopia (no green cones) | #003885 | 0.011 |
| Tritanopia (no blue cones) | #004B59 | 0.108 |
| Achromatopsia (no color) | #3D3D3D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143787
#143787
oklch(36.6% 0.14 263.3)
- #523A00
#523A00
oklch(36.6% 0.075 82.4)
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 #143787, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Cobalt #1E488F ΔE 0.050
- Marine Blue #01386A ΔE 0.052
- Sapphire #2138AB ΔE 0.061
- Royal #0C1793 ΔE 0.069
- Light Navy #155084 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.073
- Marine #042E60 ΔE 0.073
Use #143787 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.