#423AA7
Closest named color: Blueberry (#464196). oklch(42.7% 0.168 279.8), rgb(66, 58, 167).
Aa
White text reads best on this color (8.76:1).
About this color
#423AA7 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.168 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.034 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #423AA7 |
| RGB | rgb(66, 58, 167) |
| HSL | hsl(244, 48%, 44%) |
| OKLCH | oklch(42.7% 0.168 279.8) |
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 #423AA7 | 8.76:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #423AA7 | 2.39:1 | Fails | Lc 14.5 | Not readable |
| #423AA7 text on white | 8.76:1 | AAA | Lc 89.5 | Fine for body text |
| #423AA7 text on black | 2.39:1 | Fails | Lc -12.7 | 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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E8FD
oklch(93.5% 0.029 279.4)
-
Step 200
200
#D1D6FE
oklch(88.5% 0.055 279.6)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#8F93FF
oklch(70.7% 0.156 280)
-
Step 500
500
#7673FE
oklch(63.1% 0.201 279.9)
-
Step 600
600
#6156EE
oklch(55.5% 0.22 279.7)
-
Step 700
700
#5145CF
oklch(49.1% 0.204 279.7)
-
Step 800
800 (this color)
#423AA7
oklch(42.7% 0.168 279.8)
-
Step 900
900
#373484
oklch(37.7% 0.13 279.8)
-
Step 950
950
#201F4E
oklch(27% 0.084 280.1)
#423AA7 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) | #004FAA | 0.067 |
| Deuteranopia (no green cones) | #0046A5 | 0.060 |
| Tritanopia (no blue cones) | #00566B | 0.144 |
| Achromatopsia (no color) | #4B4B4B | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423AA7
#423AA7
oklch(42.7% 0.168 279.8)
- #5B4F00
#5B4F00
oklch(42.7% 0.088 99.2)
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 #423AA7, closest first.
No curated palette has a color within ΔE 0.04 of #423AA7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.048
- Majorelle Blue #3F37C9 ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Indigo Blue #3A18B1 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.064
- Cobalt #1E488F ΔE 0.066
Use #423AA7 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.