#42151D
Closest named color: Mahogany (#4A0100). oklch(27% 0.07 12.3), rgb(66, 21, 29).
Aa
White text reads best on this color (15.47:1).
About this color
#42151D is a dark, moderately saturated red. In OKLCH its lightness is 27%, its chroma 0.070 and its hue 12°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.045 away. White text reads best on it, at 15.47:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.070) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.35:1 |
| White text | 15.47:1 |
Values
| HEX | #42151D |
| RGB | rgb(66, 21, 29) |
| HSL | hsl(349, 52%, 17%) |
| OKLCH | oklch(27% 0.07 12.3) |
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 #42151D | 15.47:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #42151D | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #42151D text on white | 15.47:1 | AAA | Lc 102.0 | Preferred for body text |
| #42151D text on black | 1.35:1 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#F9E4E5
oklch(93.6% 0.023 14.3)
-
Step 200
200
#F6CDD1
oklch(88.4% 0.047 11.4)
-
Step 300
300
#F1ABB2
oklch(80.9% 0.083 12.5)
-
Step 400
400
#E67B8A
oklch(70.6% 0.133 12.2)
-
Step 500
500
#DC546D
oklch(63.1% 0.17 12.3)
-
Step 600
600
#C73355
oklch(55.7% 0.184 12.5)
-
Step 700
700
#AB2346
oklch(49.1% 0.171 12.1)
-
Step 800
800
#8B2039
oklch(42.7% 0.142 12.4)
-
Step 900
900
#702231
oklch(37.8% 0.11 12.7)
-
Step 950
950 (this color)
#42151D
oklch(27% 0.07 12.3)
#42151D 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) | #1F1F1D | 0.077 |
| Deuteranopia (no green cones) | #2B281C | 0.071 |
| Tritanopia (no blue cones) | #480E18 | 0.017 |
| Achromatopsia (no color) | #242424 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42151D
#42151D
oklch(27% 0.07 12.3)
- #002D2C
#002D2C
oklch(26.9% 0.046 192.5)
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 #42151D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.045
- Chocolate Brown #411900 ΔE 0.045
- Deep Brown #410200 ΔE 0.048
- Dark Maroon #3C0008 ΔE 0.051
- Dark Plum #3F012C ΔE 0.057
- Dark Brown #341C02 ΔE 0.059
- Aubergine #3D0734 ΔE 0.062
- Eggplant #380835 ΔE 0.067
Use #42151D 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.