#1646B3
Closest named color: Blue Blue (#2242C7). oklch(43.7% 0.181 263.1), rgb(22, 70, 179).
Aa
White text reads best on this color (8.19:1).
About this color
#1646B3 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.181 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.034 away. White text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #1646B3 |
| RGB | rgb(22, 70, 179) |
| HSL | hsl(222, 78%, 39%) |
| OKLCH | oklch(43.7% 0.181 263.1) |
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 #1646B3 | 8.19:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #1646B3 | 2.56:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #1646B3 text on white | 8.19:1 | AAA | Lc 87.6 | Fine for body text |
| #1646B3 text on black | 2.56:1 | Fails | Lc -14.5 | 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
#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
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#2062F9
oklch(55.5% 0.235 263.1)
-
Step 700
700
#1450D9
oklch(49.1% 0.218 263.1)
-
Step 800
800 (this color)
#1646B3
oklch(43.7% 0.181 263.1)
-
Step 900
900
#163A8B
oklch(37.7% 0.141 263.2)
-
Step 950
950
#0E2351
oklch(27% 0.089 263.2)
#1646B3 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) | #0056B7 | 0.039 |
| Deuteranopia (no green cones) | #0048B1 | 0.010 |
| Tritanopia (no blue cones) | #006275 | 0.139 |
| Achromatopsia (no color) | #4F4F4F | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1646B3
#1646B3
oklch(43.7% 0.181 263.1)
- #6A4C00
#6A4C00
oklch(43.7% 0.09 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 #1646B3, closest first.
No curated palette has a color within ΔE 0.04 of #1646B3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.034
- Sapphire #2138AB ΔE 0.034
- Majorelle Blue #3F37C9 ΔE 0.058
- Cobalt #1E488F ΔE 0.059
- Blueberry #464196 ΔE 0.069
- Dusk Blue #26538D ΔE 0.075
- Blue With A Hint Of Purple #533CC6 ΔE 0.077
- Indigo Blue #3A18B1 ΔE 0.083
Use #1646B3 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.