#A4290B
Closest named color: Rust Red (#AA2704). oklch(47.5% 0.164 33.8), rgb(164, 41, 11).
Aa
White text reads best on this color (7.24:1).
About this color
#A4290B is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.164 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Red (#AA2704), ΔE 0.012 away. White text reads best on it, at 7.24:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 2.90:1 |
| White text | 7.24:1 |
Values
| HEX | #A4290B |
| RGB | rgb(164, 41, 11) |
| HSL | hsl(12, 87%, 34%) |
| OKLCH | oklch(47.5% 0.164 33.8) |
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 #A4290B | 7.24:1 | AAA | Lc -88.7 | Fine for body text |
| Black text on #A4290B | 2.90:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #A4290B text on white | 7.24:1 | AAA | Lc 83.8 | Fine for body text |
| #A4290B text on black | 2.90:1 | Fails | Lc -18.2 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC6
oklch(88.4% 0.045 33.5)
-
Step 300
300
#EFAF9F
oklch(81% 0.079 34.5)
-
Step 400
400
#E4816B
oklch(70.6% 0.127 33.5)
-
Step 500
500
#D95D42
oklch(63% 0.162 33.8)
-
Step 600
600
#C53E21
oklch(55.6% 0.176 33.6)
-
Step 700
700 (this color)
#A4290B
oklch(47.5% 0.164 33.8)
-
Step 800
800
#8A2913
oklch(42.8% 0.136 34)
-
Step 900
900
#6F2717
oklch(37.8% 0.106 34.1)
-
Step 950
950
#41180F
oklch(27% 0.066 33.9)
#A4290B 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) | #4F4503 | 0.173 |
| Deuteranopia (no green cones) | #6E6100 | 0.155 |
| Tritanopia (no blue cones) | #B50025 | 0.050 |
| Achromatopsia (no color) | #575757 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A4290B
#A4290B
oklch(47.5% 0.164 33.8)
- #006879
#006879
oklch(47.6% 0.084 214)
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 #A4290B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.012
- Burnt Red #9F2305 ΔE 0.015
- Brick #A03623 ΔE 0.022
- Rufous #AE2012 ΔE 0.022
- Brown #A52A2A ΔE 0.024
- Rusty Red #AF2F0D ΔE 0.027
- Russet #A13905 ΔE 0.027
- Auburn #9B2226 ΔE 0.034
Use #A4290B 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.