#423D7B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.102 284.4), rgb(66, 61, 123).
Aa
White text reads best on this color (9.61:1).
About this color
#423D7B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.102 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 9.61:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.61:1 |
Values
| HEX | #423D7B |
| RGB | rgb(66, 61, 123) |
| HSL | hsl(245, 34%, 36%) |
| OKLCH | oklch(39.8% 0.102 284.4) |
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 #423D7B | 9.61:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #423D7B | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #423D7B text on white | 9.61:1 | AAA | Lc 92.1 | Preferred for body text |
| #423D7B text on black | 2.18:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F5
oklch(88.5% 0.042 284)
-
Step 300
300
#BABAF1
oklch(80.8% 0.077 284.5)
-
Step 400
400
#9895EA
oklch(70.7% 0.123 284.4)
-
Step 500
500
#8179E3
oklch(63.2% 0.155 284.5)
-
Step 600
600
#6B5FD1
oklch(55.6% 0.17 284.2)
-
Step 700
700
#5A4EB5
oklch(49.2% 0.157 284.3)
-
Step 800
800
#494092
oklch(42.6% 0.13 284.4)
-
Step 900
900 (this color)
#423D7B
oklch(39.8% 0.102 284.4)
-
Step 950
950
#232144
oklch(27% 0.064 283.9)
#423D7B 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) | #23477D | 0.046 |
| Deuteranopia (no green cones) | #21437A | 0.045 |
| Tritanopia (no blue cones) | #304A56 | 0.087 |
| Achromatopsia (no color) | #454545 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423D7B
#423D7B
oklch(39.8% 0.102 284.4)
- #4F4900
#4F4900
oklch(39.9% 0.084 104.2)
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 #423D7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.046
- Cobalt #1E488F ΔE 0.056
- Twilight Blue #0A437A ΔE 0.060
- Twilight #4E518B ΔE 0.063
- Light Navy #155084 ΔE 0.066
- Dusk Blue #26538D ΔE 0.068
- Dusk #4E5481 ΔE 0.070
Use #423D7B 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.