#42101D
Closest named color: Mahogany (#4A0100). oklch(26.3% 0.078 8.6), rgb(66, 16, 29).
Aa
White text reads best on this color (15.86:1).
About this color
#42101D is a dark, moderately saturated red. In OKLCH its lightness is 26%, its chroma 0.078 and its hue 9°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.043 away. White text reads best on it, at 15.86:1.
| Hue family | Reds |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.32:1 |
| White text | 15.86:1 |
Values
| HEX | #42101D |
| RGB | rgb(66, 16, 29) |
| HSL | hsl(344, 61%, 16%) |
| OKLCH | oklch(26.3% 0.078 8.6) |
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 #42101D | 15.86:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #42101D | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #42101D text on white | 15.86:1 | AAA | Lc 102.3 | Preferred for body text |
| #42101D 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
#FBE3E6
oklch(93.6% 0.027 9)
-
Step 200
200
#F8CCD2
oklch(88.5% 0.05 8.9)
-
Step 300
300
#F5A8B5
oklch(80.9% 0.092 8.2)
-
Step 400
400
#EC768E
oklch(70.8% 0.147 8.7)
-
Step 500
500
#E24B72
oklch(63.2% 0.188 8.8)
-
Step 600
600
#CD225B
oklch(55.6% 0.204 8.5)
-
Step 700
700
#B10E4B
oklch(49.1% 0.19 8.4)
-
Step 800
800
#90143D
oklch(42.8% 0.157 8.9)
-
Step 900
900
#731B34
oklch(37.6% 0.122 8.6)
-
Step 950
950 (this color)
#42101D
oklch(26.3% 0.078 8.6)
#42101D 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) | #1B1C1D | 0.087 |
| Deuteranopia (no green cones) | #28261C | 0.080 |
| Tritanopia (no blue cones) | #490815 | 0.020 |
| Achromatopsia (no color) | #222222 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42101D
#42101D
oklch(26.3% 0.078 8.6)
- #002C29
#002C29
oklch(26.4% 0.046 187.8)
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 #42101D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.043
- Dark Maroon #3C0008 ΔE 0.043
- Deep Brown #410200 ΔE 0.044
- Dark Plum #3F012C ΔE 0.048
- Chocolate Brown #411900 ΔE 0.053
- Aubergine #3D0734 ΔE 0.054
- Eggplant #380835 ΔE 0.061
- Dark Brown #341C02 ΔE 0.066
Use #42101D 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.