#42375B
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.062 297.3), rgb(66, 55, 91).
Aa
White text reads best on this color (10.88:1).
About this color
#42375B is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.062 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 0.056 away. White text reads best on it, at 10.88:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.062) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.92:1 |
| White text | 10.88:1 |
Values
| HEX | #42375B |
| RGB | rgb(66, 55, 91) |
| HSL | hsl(258, 25%, 29%) |
| OKLCH | oklch(36.5% 0.062 297.3) |
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 #42375B | 10.88:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #42375B | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #42375B text on white | 10.88:1 | AAA | Lc 95.2 | Preferred for body text |
| #42375B text on black | 1.92:1 | 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
#EBE8F2
oklch(93.6% 0.014 299.8)
-
Step 200
200
#DBD6E9
oklch(88.6% 0.026 297.9)
-
Step 300
300
#C3BBDC
oklch(80.9% 0.047 296.4)
-
Step 400
400
#A597CA
oklch(70.7% 0.075 297)
-
Step 500
500
#907DBC
oklch(63.1% 0.095 297.5)
-
Step 600
600
#7A65A8
oklch(55.5% 0.104 297.3)
-
Step 700
700
#675490
oklch(49.1% 0.096 297.3)
-
Step 800
800
#544575
oklch(42.7% 0.079 297.3)
-
Step 900
900 (this color)
#42375B
oklch(36.5% 0.062 297.3)
-
Step 950
950
#282237
oklch(26.9% 0.039 296.8)
#42375B 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) | #2E3D5C | 0.035 |
| Deuteranopia (no green cones) | #303C5A | 0.032 |
| Tritanopia (no blue cones) | #3D3D44 | 0.050 |
| Achromatopsia (no color) | #3D3D3D | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42375B
#42375B
oklch(36.5% 0.062 297.3)
- #3C431A
#3C431A
oklch(36.6% 0.062 117.7)
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 #42375B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.056
- Onyx #343A40 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.061
- Charcoal Grey #3C4142 ΔE 0.062
- Charcoal #264653 ΔE 0.064
- Gunmetal #293241 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.066
Use #42375B 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.