#423866
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.078 292.2), rgb(66, 56, 102).
Aa
White text reads best on this color (10.55:1).
About this color
#423866 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.061 away. White text reads best on it, at 10.55:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.55:1 |
Values
| HEX | #423866 |
| RGB | rgb(66, 56, 102) |
| HSL | hsl(253, 29%, 31%) |
| OKLCH | oklch(37.4% 0.078 292.2) |
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 #423866 | 10.55:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #423866 | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #423866 text on white | 10.55:1 | AAA | Lc 94.4 | Preferred for body text |
| #423866 text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D6ED
oklch(88.5% 0.031 291.7)
-
Step 300
300
#C1BAE4
oklch(80.8% 0.059 292.7)
-
Step 400
400
#A296D6
oklch(70.7% 0.093 292.5)
-
Step 500
500
#8C7BCB
oklch(63.2% 0.119 292.4)
-
Step 600
600
#7663B8
oklch(55.7% 0.129 292)
-
Step 700
700
#63519E
oklch(49% 0.12 292.1)
-
Step 800
800
#514380
oklch(42.7% 0.099 292.2)
-
Step 900
900 (this color)
#423866
oklch(37.4% 0.078 292.2)
-
Step 950
950
#27223C
oklch(27.1% 0.048 291.7)
#423866 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) | #2A4068 | 0.040 |
| Deuteranopia (no green cones) | #2B3E65 | 0.038 |
| Tritanopia (no blue cones) | #3A414A | 0.064 |
| Achromatopsia (no color) | #3F3F3F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423866
#423866
oklch(37.4% 0.078 292.2)
- #424408
#424408
oklch(37.3% 0.077 111.6)
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 #423866, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.072
- Charcoal #264653 ΔE 0.072
- Marine Blue #01386A ΔE 0.073
- Onyx #343A40 ΔE 0.074
Use #423866 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.