#423BA3
Closest named color: Blueberry (#464196). oklch(42.5% 0.162 280), rgb(66, 59, 163).
Aa
White text reads best on this color (8.80:1).
About this color
#423BA3 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.162 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.027 away. White text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #423BA3 |
| RGB | rgb(66, 59, 163) |
| HSL | hsl(244, 47%, 44%) |
| OKLCH | oklch(42.5% 0.162 280) |
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 #423BA3 | 8.80:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #423BA3 | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #423BA3 text on white | 8.80:1 | AAA | Lc 89.6 | Fine for body text |
| #423BA3 text on black | 2.38:1 | Fails | Lc -12.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D2D6FC
oklch(88.5% 0.052 280.5)
-
Step 300
300
#B4BAFD
oklch(80.8% 0.095 280.1)
-
Step 400
400
#8F94FC
oklch(70.7% 0.15 279.7)
-
Step 500
500
#7775FA
oklch(63.2% 0.193 280)
-
Step 600
600
#6259E9
oklch(55.7% 0.21 279.9)
-
Step 700
700
#5247CB
oklch(49.1% 0.196 280.1)
-
Step 800
800 (this color)
#423BA3
oklch(42.5% 0.162 280)
-
Step 900
900
#373582
oklch(37.8% 0.126 279.7)
-
Step 950
950
#20204C
oklch(27.1% 0.079 279.7)
#423BA3 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) | #004EA6 | 0.065 |
| Deuteranopia (no green cones) | #0046A1 | 0.060 |
| Tritanopia (no blue cones) | #005569 | 0.139 |
| Achromatopsia (no color) | #4A4A4A | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423BA3
#423BA3
oklch(42.5% 0.162 280)
- #5A4F00
#5A4F00
oklch(42.5% 0.088 100.1)
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 #423BA3, closest first.
No curated palette has a color within ΔE 0.04 of #423BA3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.027
- Dark Slate Blue #483D8B ΔE 0.041
- Sapphire #2138AB ΔE 0.047
- Cobalt #1E488F ΔE 0.061
- Majorelle Blue #3F37C9 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Indigo Blue #3A18B1 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.067
Use #423BA3 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.