#42181C
Closest named color: Chocolate Brown (#411900). oklch(27.5% 0.065 16.6), rgb(66, 24, 28).
Aa
White text reads best on this color (15.22:1).
About this color
#42181C is a dark, muted red. In OKLCH its lightness is 27%, its chroma 0.065 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.039 away. White text reads best on it, at 15.22:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.37:1 |
| White text | 15.22:1 |
Values
| HEX | #42181C |
| RGB | rgb(66, 24, 28) |
| HSL | hsl(354, 47%, 18%) |
| OKLCH | oklch(27.5% 0.065 16.6) |
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 #42181C | 15.22:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #42181C | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #42181C text on white | 15.22:1 | AAA | Lc 101.8 | Preferred for body text |
| #42181C text on black | 1.37:1 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F9E4E5
oklch(93.6% 0.023 14.3)
-
Step 200
200
#F4CECF
oklch(88.4% 0.043 16.2)
-
Step 300
300
#EEADAF
oklch(80.9% 0.077 16.8)
-
Step 400
400
#E37F85
oklch(70.7% 0.123 16.9)
-
Step 500
500
#D85A67
oklch(63.1% 0.158 16.6)
-
Step 600
600
#C33B4F
oklch(55.6% 0.172 16.4)
-
Step 700
700
#A82C3F
oklch(49.2% 0.159 16.9)
-
Step 800
800
#882634
oklch(42.6% 0.132 16.8)
-
Step 900
900
#6E252E
oklch(37.7% 0.104 16.3)
-
Step 950
950 (this color)
#42181C
oklch(27.5% 0.065 16.6)
#42181C 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) | #21201C | 0.072 |
| Deuteranopia (no green cones) | #2C291B | 0.066 |
| Tritanopia (no blue cones) | #48121A | 0.017 |
| Achromatopsia (no color) | #262626 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42181C
#42181C
oklch(27.5% 0.065 16.6)
- #002E2F
#002E2F
oklch(27.3% 0.046 197.1)
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 #42181C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.039
- Mahogany #4A0100 ΔE 0.047
- Deep Brown #410200 ΔE 0.050
- Dark Brown #341C02 ΔE 0.054
- Dark Maroon #3C0008 ΔE 0.056
- Dark Plum #3F012C ΔE 0.065
- Aubergine #3D0734 ΔE 0.068
- Jet #212529 ΔE 0.073
Use #42181C 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.