#42374F
Closest named color: Onyx (#343A40). oklch(35.9% 0.043 305.3), rgb(66, 55, 79).
Aa
White text reads best on this color (11.10:1).
About this color
#42374F is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.043 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.040 away. White text reads best on it, at 11.10:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.043) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #42374F |
| RGB | rgb(66, 55, 79) |
| HSL | hsl(268, 18%, 26%) |
| OKLCH | oklch(35.9% 0.043 305.3) |
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 #42374F | 11.10:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #42374F | 1.89:1 | Fails | Lc 8.2 | Not readable |
| #42374F text on white | 11.10:1 | AAA | Lc 95.7 | Preferred for body text |
| #42374F text on black | 1.89:1 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EBE8EF
oklch(93.5% 0.01 305.4)
-
Step 200
200
#DCD6E3
oklch(88.5% 0.019 306.6)
-
Step 300
300
#C5BCD2
oklch(80.9% 0.032 304.2)
-
Step 400
400
#A899BB
oklch(70.7% 0.052 305.1)
-
Step 500
500
#9380AA
oklch(63.2% 0.065 305.2)
-
Step 600
600
#7D6995
oklch(55.7% 0.071 305)
-
Step 700
700
#6A577F
oklch(49.1% 0.066 305.8)
-
Step 800
800
#564767
oklch(42.6% 0.055 305.6)
-
Step 900
900 (this color)
#42374F
oklch(35.9% 0.043 305.3)
-
Step 950
950
#2A2331
oklch(27% 0.027 307.3)
#42374F 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) | #323B50 | 0.028 |
| Deuteranopia (no green cones) | #353C4E | 0.026 |
| Tritanopia (no blue cones) | #403A3F | 0.033 |
| Achromatopsia (no color) | #3C3C3C | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42374F
#42374F
oklch(35.9% 0.043 305.3)
- #374128
#374128
oklch(35.9% 0.043 126.2)
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 #42374F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.046
- Gunmetal #293241 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.057
- Charcoal #264653 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.059
Use #42374F 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.