#40102B
Closest named color: Dark Plum (#3F012C). oklch(26.5% 0.081 349.4), rgb(64, 16, 43).
Aa
White text reads best on this color (15.82:1).
About this color
#40102B is a dark, moderately saturated red. In OKLCH its lightness is 26%, its chroma 0.081 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.029 away. White text reads best on it, at 15.82:1.
| Hue family | Reds |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.32:1 |
| White text | 15.82:1 |
Values
| HEX | #40102B |
| RGB | rgb(64, 16, 43) |
| HSL | hsl(326, 60%, 16%) |
| OKLCH | oklch(26.5% 0.081 349.4) |
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 #40102B | 15.82:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #40102B | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #40102B text on white | 15.82:1 | AAA | Lc 102.3 | Preferred for body text |
| #40102B text on black | 1.32:1 | 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 950.
-
Step 50
50
#FDF2F7
oklch(97.1% 0.013 347.9)
-
Step 100
100
#F9E3ED
oklch(93.6% 0.027 348.3)
-
Step 200
200
#F6CBDE
oklch(88.4% 0.054 349.9)
-
Step 300
300
#F0A7CA
oklch(80.8% 0.096 349.2)
-
Step 400
400
#E574AF
oklch(70.6% 0.155 349.2)
-
Step 500
500
#DA499B
oklch(63% 0.197 349.4)
-
Step 600
600
#C52086
oklch(55.5% 0.214 349.2)
-
Step 700
700
#AA0C71
oklch(49.1% 0.199 349.5)
-
Step 800
800
#8A135C
oklch(42.7% 0.165 349.5)
-
Step 900
900
#6F1A4C
oklch(37.6% 0.129 349)
-
Step 950
950 (this color)
#40102B
oklch(26.5% 0.081 349.4)
#40102B 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) | #171D2C | 0.089 |
| Deuteranopia (no green cones) | #24262A | 0.081 |
| Tritanopia (no blue cones) | #450E1B | 0.031 |
| Achromatopsia (no color) | #222222 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40102B
#40102B
oklch(26.5% 0.081 349.4)
- #002D21
#002D21
oklch(26.4% 0.052 169.9)
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 #40102B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.029
- Aubergine #3D0734 ΔE 0.029
- Eggplant #380835 ΔE 0.037
- Eggplant Purple #430541 ΔE 0.048
- Dark Purple #35063E ΔE 0.055
- Deep Violet #490648 ΔE 0.060
- Deep Purple #36013F ΔE 0.061
- Dark Maroon #3C0008 ΔE 0.061
Use #40102B 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.