#421021
Closest named color: Dark Plum (#3F012C). oklch(26.4% 0.079 3.4), rgb(66, 16, 33).
Aa
White text reads best on this color (15.81:1).
About this color
#421021 is a dark, moderately saturated red. In OKLCH its lightness is 26%, its chroma 0.079 and its hue 3°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.042 away. White text reads best on it, at 15.81:1.
| Hue family | Reds |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.32:1 |
| White text | 15.81:1 |
Values
| HEX | #421021 |
| RGB | rgb(66, 16, 33) |
| HSL | hsl(340, 61%, 16%) |
| OKLCH | oklch(26.4% 0.079 3.4) |
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 #421021 | 15.81:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #421021 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #421021 text on white | 15.81:1 | AAA | Lc 102.3 | Preferred for body text |
| #421021 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
#FDF2F4
oklch(97% 0.012 4.7)
-
Step 100
100
#FBE3E8
oklch(93.7% 0.027 3.4)
-
Step 200
200
#F8CCD5
oklch(88.6% 0.051 4.4)
-
Step 300
300
#F4A7BA
oklch(80.8% 0.094 3.2)
-
Step 400
400
#EB7597
oklch(70.8% 0.149 3.4)
-
Step 500
500
#E14A7D
oklch(63.2% 0.19 3.7)
-
Step 600
600
#CC2067
oklch(55.7% 0.207 3.3)
-
Step 700
700
#B00C55
oklch(49.2% 0.192 3.6)
-
Step 800
800
#8F1346
oklch(42.8% 0.159 3.4)
-
Step 900
900
#731A3B
oklch(37.7% 0.125 3.1)
-
Step 950
950 (this color)
#421021
oklch(26.4% 0.079 3.4)
#421021 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) | #1A1C21 | 0.089 |
| Deuteranopia (no green cones) | #282620 | 0.079 |
| Tritanopia (no blue cones) | #480917 | 0.021 |
| Achromatopsia (no color) | #222222 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #421021
#421021
oklch(26.4% 0.079 3.4)
- #002C27
#002C27
oklch(26.3% 0.047 183.3)
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 #421021, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.042
- Aubergine #3D0734 ΔE 0.048
- Dark Maroon #3C0008 ΔE 0.048
- Mahogany #4A0100 ΔE 0.049
- Deep Brown #410200 ΔE 0.050
- Eggplant #380835 ΔE 0.054
- Chocolate Brown #411900 ΔE 0.059
- Eggplant Purple #430541 ΔE 0.067
Use #421021 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.