#42375C
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.064 296.8), rgb(66, 55, 92).
Aa
White text reads best on this color (10.86:1).
About this color
#42375C is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.064 and its hue 297°. 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 10.86:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.93:1 |
| White text | 10.86:1 |
Values
| HEX | #42375C |
| RGB | rgb(66, 55, 92) |
| HSL | hsl(258, 25%, 29%) |
| OKLCH | oklch(36.5% 0.064 296.8) |
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 #42375C | 10.86:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #42375C | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #42375C text on white | 10.86:1 | AAA | Lc 95.1 | Preferred for body text |
| #42375C text on black | 1.93:1 | Fails | Lc -7.5 | 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
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#DAD6E9
oklch(88.5% 0.026 295.5)
-
Step 300
300
#C3BBDC
oklch(80.9% 0.047 296.4)
-
Step 400
400
#A597CB
oklch(70.7% 0.076 296.8)
-
Step 500
500
#8F7DBE
oklch(63.2% 0.098 296.2)
-
Step 600
600
#7A65AA
oklch(55.6% 0.107 296.8)
-
Step 700
700
#675492
oklch(49.2% 0.098 296.7)
-
Step 800
800
#544576
oklch(42.8% 0.081 296.9)
-
Step 900
900 (this color)
#42375C
oklch(36.5% 0.064 296.8)
-
Step 950
950
#282238
oklch(26.9% 0.041 296.1)
#42375C 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) | #2D3D5D | 0.036 |
| Deuteranopia (no green cones) | #2F3D5B | 0.034 |
| Tritanopia (no blue cones) | #3D3D45 | 0.050 |
| Achromatopsia (no color) | #3D3D3D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42375C
#42375C
oklch(36.5% 0.064 296.8)
- #3C4318
#3C4318
oklch(36.6% 0.065 117.4)
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 #42375C, 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 0.058
- Onyx #343A40 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.062
- Charcoal Grey #3C4142 ΔE 0.064
- Charcoal #264653 ΔE 0.065
- Gunmetal #293241 ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.067
Use #42375C 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.