#423BA9
Closest named color: Blueberry (#464196). oklch(43% 0.17 279.3), rgb(66, 59, 169).
Aa
White text reads best on this color (8.64:1).
About this color
#423BA9 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.170 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.035 away. White text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.43:1 |
| White text | 8.64:1 |
Values
| HEX | #423BA9 |
| RGB | rgb(66, 59, 169) |
| HSL | hsl(244, 48%, 45%) |
| OKLCH | oklch(43% 0.17 279.3) |
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 #423BA9 | 8.64:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #423BA9 | 2.43:1 | Fails | Lc 14.8 | Not readable |
| #423BA9 text on white | 8.64:1 | AAA | Lc 89.1 | Fine for body text |
| #423BA9 text on black | 2.43:1 | Fails | Lc -13.1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
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
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7573FF
oklch(63% 0.202 279.5)
-
Step 600
600
#6056EF
oklch(55.5% 0.221 279.3)
-
Step 700
700
#5045D0
oklch(49.1% 0.205 279.2)
-
Step 800
800 (this color)
#423BA9
oklch(43% 0.17 279.3)
-
Step 900
900
#363485
oklch(37.7% 0.132 279.1)
-
Step 950
950
#1F1F4E
oklch(26.9% 0.084 279.1)
#423BA9 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) | #0050AC | 0.066 |
| Deuteranopia (no green cones) | #0047A7 | 0.059 |
| Tritanopia (no blue cones) | #00576C | 0.144 |
| Achromatopsia (no color) | #4C4C4C | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423BA9
#423BA9
oklch(43% 0.17 279.3)
- #5C5000
#5C5000
oklch(43% 0.089 99.3)
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 #423BA9, closest first.
No curated palette has a color within ΔE 0.04 of #423BA9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.035
- Sapphire #2138AB ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.051
- Majorelle Blue #3F37C9 ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.061
- Indigo Blue #3A18B1 ΔE 0.062
- Blurple #5539CC ΔE 0.063
Use #423BA9 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.