#423966
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.076 291.5), rgb(66, 57, 102).
Aa
White text reads best on this color (10.45:1).
About this color
#423966 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.076 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 0.059 away. White text reads best on it, at 10.45:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #423966 |
| RGB | rgb(66, 57, 102) |
| HSL | hsl(252, 28%, 31%) |
| OKLCH | oklch(37.6% 0.076 291.5) |
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 #423966 | 10.45:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #423966 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #423966 text on white | 10.45:1 | AAA | Lc 94.2 | Preferred for body text |
| #423966 text on black | 2.00:1 | Fails | Lc -8.4 | 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
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6ED
oklch(88.5% 0.031 291.7)
-
Step 300
300
#C0BBE3
oklch(80.9% 0.056 290.8)
-
Step 400
400
#A197D5
oklch(70.8% 0.09 291.3)
-
Step 500
500
#8B7CCA
oklch(63.2% 0.116 291.6)
-
Step 600
600
#7564B7
oklch(55.7% 0.126 291.2)
-
Step 700
700
#63529D
oklch(49.1% 0.117 291.9)
-
Step 800
800
#504480
oklch(42.8% 0.097 290.9)
-
Step 900
900 (this color)
#423966
oklch(37.6% 0.076 291.5)
-
Step 950
950
#27223C
oklch(27.1% 0.048 291.7)
#423966 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) | #2B4068 | 0.038 |
| Deuteranopia (no green cones) | #2C3F65 | 0.036 |
| Tritanopia (no blue cones) | #39414A | 0.063 |
| Achromatopsia (no color) | #3F3F3F | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423966
#423966
oklch(37.6% 0.076 291.5)
- #43450B
#43450B
oklch(37.7% 0.076 111.6)
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 #423966, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.069
- Charcoal #264653 ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.071
- Onyx #343A40 ΔE 0.073
- Marine Blue #01386A ΔE 0.074
Use #423966 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.