#42376A
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.086 291.6), rgb(66, 55, 106).
Aa
White text reads best on this color (10.57:1).
About this color
#42376A is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.086 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 10.57:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.57:1 |
Values
| HEX | #42376A |
| RGB | rgb(66, 55, 106) |
| HSL | hsl(253, 32%, 32%) |
| OKLCH | oklch(37.4% 0.086 291.6) |
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 #42376A | 10.57:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #42376A | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #42376A text on white | 10.57:1 | AAA | Lc 94.4 | Preferred for body text |
| #42376A text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#D9D5EF
oklch(88.4% 0.036 292.7)
-
Step 300
300
#C1BAE7
oklch(81% 0.063 292.1)
-
Step 400
400
#A195DC
oklch(70.7% 0.103 291.3)
-
Step 500
500
#8B79D2
oklch(63.1% 0.132 291.5)
-
Step 600
600
#7660BF
oklch(55.5% 0.143 291.7)
-
Step 700
700
#634FA5
oklch(49.1% 0.133 291.4)
-
Step 800
800
#514185
oklch(42.6% 0.11 291.9)
-
Step 900
900 (this color)
#42376A
oklch(37.4% 0.086 291.6)
-
Step 950
950
#27213F
oklch(27% 0.055 291.5)
#42376A 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) | #26406C | 0.045 |
| Deuteranopia (no green cones) | #273E69 | 0.043 |
| Tritanopia (no blue cones) | #38414B | 0.071 |
| Achromatopsia (no color) | #3F3F3F | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42376A
#42376A
oklch(37.4% 0.086 291.6)
- #424400
#424400
oklch(37.2% 0.082 111.7)
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 #42376A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
- Twilight Blue #0A437A ΔE 0.068
- Marine Blue #01386A ΔE 0.073
- Blueberry #464196 ΔE 0.076
- Dark Blue Grey #1F3B4D ΔE 0.077
- Charcoal #264653 ΔE 0.078
Use #42376A 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.