#A42D04
Closest named color: Rust Red (#AA2704). oklch(47.9% 0.161 36), rgb(164, 45, 4).
Aa
White text reads best on this color (7.10:1).
About this color
#A42D04 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.161 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Red (#AA2704), ΔE 0.013 away. White text reads best on it, at 7.10:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #A42D04 |
| RGB | rgb(164, 45, 4) |
| HSL | hsl(15, 95%, 33%) |
| OKLCH | oklch(47.9% 0.161 36) |
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 #A42D04 | 7.10:1 | AAA | Lc -88.4 | Fine for body text |
| Black text on #A42D04 | 2.95:1 | Fails | Lc 20.7 | Dividers and decoration only |
| #A42D04 text on white | 7.10:1 | AAA | Lc 83.4 | Fine for body text |
| #A42D04 text on black | 2.95:1 | Fails | Lc -18.6 | 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
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F4D0C6
oklch(88.5% 0.043 36)
-
Step 300
300
#EEAF9E
oklch(80.8% 0.078 35.7)
-
Step 400
400
#E38369
oklch(70.8% 0.125 36)
-
Step 500
500
#D85F3F
oklch(63.1% 0.16 35.8)
-
Step 600
600
#C3411B
oklch(55.6% 0.173 36)
-
Step 700
700 (this color)
#A42D04
oklch(47.9% 0.161 36)
-
Step 800
800
#892A0F
oklch(42.7% 0.134 35.7)
-
Step 900
900
#6E2815
oklch(37.7% 0.104 36)
-
Step 950
950
#41180E
oklch(27% 0.067 34.9)
#A42D04 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) | #524700 | 0.166 |
| Deuteranopia (no green cones) | #6F6200 | 0.150 |
| Tritanopia (no blue cones) | #B50027 | 0.057 |
| Achromatopsia (no color) | #585858 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A42D04
#A42D04
oklch(47.9% 0.161 36)
- #00697C
#00697C
oklch(48% 0.085 215.9)
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 #A42D04, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.013
- Brick #A03623 ΔE 0.020
- Burnt Red #9F2305 ΔE 0.020
- Russet #A13905 ΔE 0.020
- Rusty Red #AF2F0D ΔE 0.024
- Rufous #AE2012 ΔE 0.026
- Brown #A52A2A ΔE 0.029
- Firebrick #B22222 ΔE 0.038
Use #A42D04 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.