#42010A
Closest named color: Deep Brown (#410200). oklch(24.1% 0.095 20.7), rgb(66, 1, 10).
Aa
White text reads best on this color (16.93:1).
About this color
#42010A is a very dark, moderately saturated red. In OKLCH its lightness is 24%, its chroma 0.095 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.016 away. White text reads best on it, at 16.93:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.095) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.24:1 |
| White text | 16.93:1 |
Values
| HEX | #42010A |
| RGB | rgb(66, 1, 10) |
| HSL | hsl(352, 97%, 13%) |
| OKLCH | oklch(24.1% 0.095 20.7) |
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 #42010A | 16.93:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #42010A | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #42010A text on white | 16.93:1 | AAA | Lc 102.7 | Preferred for body text |
| #42010A text on black | 1.24:1 | 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
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FFE2E1
oklch(93.6% 0.032 20.1)
-
Step 200
200
#FFCAC8
oklch(88.5% 0.061 20.9)
-
Step 300
300
#FFA4A3
oklch(80.9% 0.108 20.4)
-
Step 400
400
#FD696F
oklch(70.7% 0.181 20.6)
-
Step 500
500
#F52D49
oklch(63% 0.23 20.6)
-
Step 600
600
#D70035
oklch(55.6% 0.223 20.7)
-
Step 700
700
#B6002B
oklch(49.1% 0.197 20.8)
-
Step 800
800
#970022
oklch(42.8% 0.172 20.8)
-
Step 900
900
#7E021C
oklch(37.6% 0.15 20.5)
-
Step 950
950 (this color)
#42010A
oklch(24.1% 0.095 20.7)
#42010A 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) | #16140A | 0.106 |
| Deuteranopia (no green cones) | #262208 | 0.097 |
| Tritanopia (no blue cones) | #4A0005 | 0.021 |
| Achromatopsia (no color) | #1D1D1D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42010A
#42010A
oklch(24.1% 0.095 20.7)
- #002527
#002527
oklch(24% 0.041 200.2)
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 #42010A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.016
- Dark Maroon #3C0008 ΔE 0.016
- Mahogany #4A0100 ΔE 0.025
- Chocolate Brown #411900 ΔE 0.055
- Dark Plum #3F012C ΔE 0.062
- Dark Brown #341C02 ΔE 0.069
- Aubergine #3D0734 ΔE 0.075
- Eggplant #380835 ΔE 0.080
Use #42010A 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.