#42101A
Closest named color: Mahogany (#4A0100). oklch(26.2% 0.077 12.4), rgb(66, 16, 26).
Aa
White text reads best on this color (15.90:1).
About this color
#42101A is a dark, moderately saturated red. In OKLCH its lightness is 26%, its chroma 0.077 and its hue 12°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.039 away. White text reads best on it, at 15.90:1.
| Hue family | Reds |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.32:1 |
| White text | 15.90:1 |
Values
| HEX | #42101A |
| RGB | rgb(66, 16, 26) |
| HSL | hsl(348, 61%, 16%) |
| OKLCH | oklch(26.2% 0.077 12.4) |
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 #42101A | 15.90:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #42101A | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #42101A text on white | 15.90:1 | AAA | Lc 102.3 | Preferred for body text |
| #42101A 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
#FEF2F3
oklch(97.1% 0.013 11.5)
-
Step 100
100
#FBE3E5
oklch(93.6% 0.026 11.9)
-
Step 200
200
#F9CCD0
oklch(88.5% 0.051 12.1)
-
Step 300
300
#F5A8B0
oklch(80.8% 0.091 12.5)
-
Step 400
400
#EC7687
oklch(70.6% 0.146 12.5)
-
Step 500
500
#E34C6A
oklch(63.2% 0.187 12.5)
-
Step 600
600
#CE2352
oklch(55.7% 0.203 12.4)
-
Step 700
700
#B21042
oklch(49.2% 0.189 12.7)
-
Step 800
800
#901537
oklch(42.7% 0.156 12.3)
-
Step 900
900
#741C2F
oklch(37.8% 0.121 12.9)
-
Step 950
950 (this color)
#42101A
oklch(26.2% 0.077 12.4)
#42101A 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) | #1C1C1A | 0.086 |
| Deuteranopia (no green cones) | #292619 | 0.078 |
| Tritanopia (no blue cones) | #490714 | 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°).
- #42101A
#42101A
oklch(26.2% 0.077 12.4)
- #002B2A
#002B2A
oklch(26.1% 0.045 192.4)
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 #42101A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.039
- Deep Brown #410200 ΔE 0.040
- Dark Maroon #3C0008 ΔE 0.041
- Chocolate Brown #411900 ΔE 0.048
- Dark Plum #3F012C ΔE 0.052
- Aubergine #3D0734 ΔE 0.059
- Dark Brown #341C02 ΔE 0.062
- Eggplant #380835 ΔE 0.065
Use #42101A 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.