#42121F
Closest named color: Mahogany (#4A0100). oklch(26.6% 0.075 7.2), rgb(66, 18, 31).
Aa
White text reads best on this color (15.69:1).
About this color
#42121F is a dark, moderately saturated red. In OKLCH its lightness is 27%, its chroma 0.075 and its hue 7°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.046 away. White text reads best on it, at 15.69:1.
| Hue family | Reds |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.33:1 |
| White text | 15.69:1 |
Values
| HEX | #42121F |
| RGB | rgb(66, 18, 31) |
| HSL | hsl(344, 57%, 16%) |
| OKLCH | oklch(26.6% 0.075 7.2) |
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 #42121F | 15.69:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #42121F | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #42121F text on white | 15.69:1 | AAA | Lc 102.2 | Preferred for body text |
| #42121F text on black | 1.33:1 | 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
#FAE3E7
oklch(93.6% 0.026 5.7)
-
Step 200
200
#F7CCD3
oklch(88.4% 0.049 7.1)
-
Step 300
300
#F3A9B6
oklch(80.9% 0.088 7.7)
-
Step 400
400
#E97791
oklch(70.6% 0.143 7)
-
Step 500
500
#DF4E76
oklch(63.1% 0.182 7.2)
-
Step 600
600
#CA285F
oklch(55.6% 0.198 7.1)
-
Step 700
700
#AE174E
oklch(49.1% 0.184 7.2)
-
Step 800
800
#8D1940
oklch(42.6% 0.151 7.2)
-
Step 900
900
#721D36
oklch(37.7% 0.119 7.4)
-
Step 950
950 (this color)
#42121F
oklch(26.6% 0.075 7.2)
#42121F 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) | #1C1D1F | 0.084 |
| Deuteranopia (no green cones) | #29271E | 0.077 |
| Tritanopia (no blue cones) | #480B17 | 0.019 |
| Achromatopsia (no color) | #232323 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42121F
#42121F
oklch(26.6% 0.075 7.2)
- #002D29
#002D29
oklch(26.7% 0.047 185.7)
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 #42121F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.046
- Dark Maroon #3C0008 ΔE 0.048
- Deep Brown #410200 ΔE 0.048
- Dark Plum #3F012C ΔE 0.049
- Chocolate Brown #411900 ΔE 0.053
- Aubergine #3D0734 ΔE 0.054
- Eggplant #380835 ΔE 0.060
- Dark Brown #341C02 ΔE 0.066
Use #42121F 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.