#143499
Closest named color: Sapphire (#2138AB). oklch(37.7% 0.168 265.1), rgb(20, 52, 153).
Aa
White text reads best on this color (10.60:1).
About this color
#143499 is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.168 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.035 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.98:1 |
| White text | 10.60:1 |
Values
| HEX | #143499 |
| RGB | rgb(20, 52, 153) |
| HSL | hsl(226, 77%, 34%) |
| OKLCH | oklch(37.7% 0.168 265.1) |
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 #143499 | 10.60:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #143499 | 1.98:1 | Fails | Lc 10.1 | Not readable |
| #143499 text on white | 10.60:1 | AAA | Lc 93.8 | Preferred for body text |
| #143499 text on black | 1.98:1 | Fails | Lc -8.7 | 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
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4D7FFF
oklch(63% 0.198 265.1)
-
Step 600
600
#2A5EFF
oklch(55.6% 0.245 265.1)
-
Step 700
700
#1641F1
oklch(49% 0.262 265.1)
-
Step 800
800
#1338C2
oklch(42.6% 0.216 265.1)
-
Step 900
900 (this color)
#143499
oklch(37.7% 0.168 265.1)
-
Step 950
950
#0C2059
oklch(27% 0.106 265.1)
#143499 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) | #00459C | 0.041 |
| Deuteranopia (no green cones) | #003897 | 0.013 |
| Tritanopia (no blue cones) | #004F61 | 0.130 |
| Achromatopsia (no color) | #3F3F3F | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143499
#143499
oklch(37.7% 0.168 265.1)
- #543E00
#543E00
oklch(37.8% 0.077 85.9)
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 #143499, closest first.
No curated palette has a color within ΔE 0.04 of #143499.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Cobalt #1E488F ΔE 0.057
- Royal #0C1793 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.067
- Cobalt Blue #030AA7 ΔE 0.069
- Ultramarine #2000B1 ΔE 0.069
- Blueberry #464196 ΔE 0.075
Use #143499 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.