#42394E
Closest named color: Onyx (#343A40). oklch(36.3% 0.037 304.1), rgb(66, 57, 78).
Aa
White text reads best on this color (10.89:1).
About this color
#42394E is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.037 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.036 away. White text reads best on it, at 10.89:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.037) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.92:1 |
| White text | 10.89:1 |
Values
| HEX | #42394E |
| RGB | rgb(66, 57, 78) |
| HSL | hsl(266, 16%, 26%) |
| OKLCH | oklch(36.3% 0.037 304.1) |
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 #42394E | 10.89:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #42394E | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #42394E text on white | 10.89:1 | AAA | Lc 95.2 | Preferred for body text |
| #42394E 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9EE
oklch(93.7% 0.007 304.2)
-
Step 200
200
#DBD7E2
oklch(88.6% 0.016 302.5)
-
Step 300
300
#C4BCD0
oklch(80.8% 0.029 303.8)
-
Step 400
400
#A69AB8
oklch(70.6% 0.045 303.4)
-
Step 500
500
#9181A6
oklch(63.1% 0.057 304.5)
-
Step 600
600
#7B6A91
oklch(55.5% 0.062 304.3)
-
Step 700
700
#68597C
oklch(49.2% 0.058 303.9)
-
Step 800
800
#554965
oklch(42.9% 0.048 304)
-
Step 900
900 (this color)
#42394E
oklch(36.3% 0.037 304.1)
-
Step 950
950
#292430
oklch(27.1% 0.023 303.9)
#42394E 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) | #353D4F | 0.023 |
| Deuteranopia (no green cones) | #373D4D | 0.022 |
| Tritanopia (no blue cones) | #403C40 | 0.030 |
| Achromatopsia (no color) | #3D3D3D | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42394E
#42394E
oklch(36.3% 0.037 304.1)
- #3A412B
#3A412B
oklch(36.2% 0.037 122.6)
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 #42394E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Gunmetal #293241 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.061
Use #42394E 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.