#423557
Closest named color: Onyx (#343A40). oklch(35.8% 0.06 301), rgb(66, 53, 87).
Aa
White text reads best on this color (11.17:1).
About this color
#423557 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.060 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.054 away. White text reads best on it, at 11.17:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #423557 |
| RGB | rgb(66, 53, 87) |
| HSL | hsl(263, 24%, 27%) |
| OKLCH | oklch(35.8% 0.06 301) |
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 #423557 | 11.17:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #423557 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #423557 text on white | 11.17:1 | AAA | Lc 95.8 | Preferred for body text |
| #423557 text on black | 1.87:1 | Fails | Lc 0.0 | 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
#DCD6E7
oklch(88.6% 0.024 301.9)
-
Step 300
300
#C5BADA
oklch(80.8% 0.046 301)
-
Step 400
400
#A897C7
oklch(70.8% 0.071 300.8)
-
Step 500
500
#937CB8
oklch(63% 0.092 301.4)
-
Step 600
600
#7D65A4
oklch(55.6% 0.099 300.8)
-
Step 700
700
#6A538D
oklch(49.1% 0.094 301.3)
-
Step 800
800
#564572
oklch(42.8% 0.075 300.7)
-
Step 900
900 (this color)
#423557
oklch(35.8% 0.06 301)
-
Step 950
950
#2A2236
oklch(27% 0.038 302.3)
#423557 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) | #2D3B58 | 0.037 |
| Deuteranopia (no green cones) | #2F3B56 | 0.035 |
| Tritanopia (no blue cones) | #3E3A42 | 0.045 |
| Achromatopsia (no color) | #3B3B3B | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423557
#423557
oklch(35.8% 0.06 301)
- #38411C
#38411C
oklch(35.7% 0.058 120.7)
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 #423557, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.060
- Gunmetal #293241 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.061
- Charcoal #264653 ΔE 0.066
Use #423557 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.