#423964
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.073 292.1), rgb(66, 57, 100).
Aa
White text reads best on this color (10.49:1).
About this color
#423964 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.073 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 0.057 away. White text reads best on it, at 10.49:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.073) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #423964 |
| RGB | rgb(66, 57, 100) |
| HSL | hsl(253, 27%, 31%) |
| OKLCH | oklch(37.4% 0.073 292.1) |
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 #423964 | 10.49:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #423964 | 2.00:1 | Fails | Lc 9.6 | Not readable |
| #423964 text on white | 10.49:1 | AAA | Lc 94.3 | Preferred for body text |
| #423964 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C1BBE2
oklch(81% 0.055 292.2)
-
Step 400
400
#A197D3
oklch(70.7% 0.087 291.6)
-
Step 500
500
#8B7CC7
oklch(63% 0.112 292.1)
-
Step 600
600
#7664B4
oklch(55.6% 0.122 292.3)
-
Step 700
700
#63539B
oklch(49.2% 0.113 291.9)
-
Step 800
800
#51447D
oklch(42.7% 0.093 292.5)
-
Step 900
900 (this color)
#423964
oklch(37.4% 0.073 292.1)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#423964 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) | #2C4066 | 0.037 |
| Deuteranopia (no green cones) | #2D3E63 | 0.034 |
| Tritanopia (no blue cones) | #3A4149 | 0.061 |
| Achromatopsia (no color) | #3F3F3F | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423964
#423964
oklch(37.4% 0.073 292.1)
- #42440F
#42440F
oklch(37.3% 0.072 111.6)
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 #423964, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.066
- Charcoal #264653 ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.069
- Twilight Blue #0A437A ΔE 0.070
- Onyx #343A40 ΔE 0.070
- Charcoal Grey #3C4142 ΔE 0.072
Use #423964 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.