#1646A4
Closest named color: Sapphire (#2138AB). oklch(42.4% 0.161 261.9), rgb(22, 70, 164).
Aa
White text reads best on this color (8.58:1).
About this color
#1646A4 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.161 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.034 away. White text reads best on it, at 8.58:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #1646A4 |
| RGB | rgb(22, 70, 164) |
| HSL | hsl(220, 76%, 36%) |
| OKLCH | oklch(42.4% 0.161 261.9) |
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 #1646A4 | 8.58:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #1646A4 | 2.44:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #1646A4 text on white | 8.58:1 | AAA | Lc 88.9 | Fine for body text |
| #1646A4 text on black | 2.44:1 | Fails | Lc -13.3 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6B9EFD
oklch(70.6% 0.15 261.9)
-
Step 500
500
#4483FB
oklch(63.2% 0.191 261.8)
-
Step 600
600
#2668EB
oklch(55.6% 0.209 262)
-
Step 700
700
#1956CC
oklch(49.2% 0.193 261.9)
-
Step 800
800 (this color)
#1646A4
oklch(42.4% 0.161 261.9)
-
Step 900
900
#193D83
oklch(37.8% 0.125 261.9)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#1646A4 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) | #0053A7 | 0.033 |
| Deuteranopia (no green cones) | #0046A2 | 0.010 |
| Tritanopia (no blue cones) | #005E6E | 0.124 |
| Achromatopsia (no color) | #4C4C4C | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1646A4
#1646A4
oklch(42.4% 0.161 261.9)
- #664800
#664800
oklch(42.3% 0.087 81.3)
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 #1646A4, closest first.
No curated palette has a color within ΔE 0.04 of #1646A4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.034
- Cobalt #1E488F ΔE 0.036
- Blueberry #464196 ΔE 0.057
- Dusk Blue #26538D ΔE 0.057
- Blue Blue #2242C7 ΔE 0.057
- Light Navy #155084 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.070
- Twilight Blue #0A437A ΔE 0.071
Use #1646A4 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.