#A42A21
Closest named color: Brown (#A52A2A). oklch(47.8% 0.16 28.8), rgb(164, 42, 33).
Aa
White text reads best on this color (7.16:1).
About this color
#A42A21 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.160 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.010 away. White text reads best on it, at 7.16:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #A42A21 |
| RGB | rgb(164, 42, 33) |
| HSL | hsl(4, 66%, 39%) |
| OKLCH | oklch(47.8% 0.16 28.8) |
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 #A42A21 | 7.16:1 | AAA | Lc -88.6 | Fine for body text |
| Black text on #A42A21 | 2.93:1 | Fails | Lc 20.5 | Dividers and decoration only |
| #A42A21 text on white | 7.16:1 | AAA | Lc 83.6 | Fine for body text |
| #A42A21 text on black | 2.93:1 | Fails | Lc -18.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F4CFC9
oklch(88.4% 0.043 28.8)
-
Step 300
300
#EFAEA4
oklch(80.9% 0.078 28.7)
-
Step 400
400
#E38173
oklch(70.7% 0.124 29.1)
-
Step 500
500
#D85D4F
oklch(63.1% 0.158 28.8)
-
Step 600
600
#C43E32
oklch(55.6% 0.172 28.9)
-
Step 700
700 (this color)
#A42A21
oklch(47.8% 0.16 28.8)
-
Step 800
800
#892920
oklch(42.8% 0.132 29.1)
-
Step 900
900
#6E271F
oklch(37.7% 0.103 29.2)
-
Step 950
950
#411813
oklch(27.1% 0.065 29.1)
#A42A21 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) | #4F471F | 0.170 |
| Deuteranopia (no green cones) | #6D611C | 0.155 |
| Tritanopia (no blue cones) | #B50029 | 0.045 |
| Achromatopsia (no color) | #585858 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A42A21
#A42A21
oklch(47.8% 0.16 28.8)
- #006976
#006976
oklch(47.7% 0.082 209.6)
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 #A42A21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.010
- Brick #A03623 ΔE 0.019
- Rust Red #AA2704 ΔE 0.020
- Rufous #AE2012 ΔE 0.021
- Burnt Red #9F2305 ΔE 0.022
- Auburn #9B2226 ΔE 0.026
- Firebrick #B22222 ΔE 0.028
- Rusty Red #AF2F0D ΔE 0.030
Use #A42A21 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.