#423759
Closest named color: Onyx (#343A40). oklch(36.4% 0.059 298.3), rgb(66, 55, 89).
Aa
White text reads best on this color (10.92:1).
About this color
#423759 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.059 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.055 away. White text reads best on it, at 10.92:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.92:1 |
| White text | 10.92:1 |
Values
| HEX | #423759 |
| RGB | rgb(66, 55, 89) |
| HSL | hsl(259, 24%, 28%) |
| OKLCH | oklch(36.4% 0.059 298.3) |
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 #423759 | 10.92:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #423759 | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #423759 text on white | 10.92:1 | AAA | Lc 95.3 | Preferred for body text |
| #423759 text on black | 1.92:1 | Fails | Lc -7.4 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DBD6E8
oklch(88.5% 0.025 298.6)
-
Step 300
300
#C4BBDA
oklch(80.9% 0.044 298.7)
-
Step 400
400
#A697C7
oklch(70.6% 0.071 298.9)
-
Step 500
500
#907DB9
oklch(63% 0.091 298.3)
-
Step 600
600
#7B66A5
oklch(55.6% 0.098 298.5)
-
Step 700
700
#67548D
oklch(49% 0.091 298.3)
-
Step 800
800
#544573
oklch(42.6% 0.076 298.1)
-
Step 900
900 (this color)
#423759
oklch(36.4% 0.059 298.3)
-
Step 950
950
#292236
oklch(26.9% 0.038 300)
#423759 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) | #2F3D5A | 0.034 |
| Deuteranopia (no green cones) | #303C58 | 0.032 |
| Tritanopia (no blue cones) | #3E3D44 | 0.047 |
| Achromatopsia (no color) | #3D3D3D | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423759
#423759
oklch(36.4% 0.059 298.3)
- #3B421C
#3B421C
oklch(36.3% 0.059 118.1)
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 #423759, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.059
- Charcoal Grey #3C4142 ΔE 0.059
- Gunmetal #293241 ΔE 0.063
- Charcoal #264653 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
Use #423759 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.