#A9042B
Closest named color: Rouge (#AB1239). oklch(46.6% 0.185 19.8), rgb(169, 4, 43).
Aa
White text reads best on this color (7.66:1).
About this color
#A9042B is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.185 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.018 away. White text reads best on it, at 7.66:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.73:1 |
| White text | 7.66:1 |
Values
| HEX | #A9042B |
| RGB | rgb(169, 4, 43) |
| HSL | hsl(346, 95%, 34%) |
| OKLCH | oklch(46.6% 0.185 19.8) |
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 #A9042B | 7.66:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #A9042B | 2.73:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #A9042B text on white | 7.66:1 | AAA | Lc 84.2 | Fine for body text |
| #A9042B text on black | 2.73:1 | Fails | Lc -17.7 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E3
oklch(93.5% 0.026 17.6)
-
Step 200
200
#F9CDCC
oklch(88.6% 0.05 19.7)
-
Step 300
300
#F5AAA9
oklch(81% 0.089 20)
-
Step 400
400
#EC787B
oklch(70.6% 0.143 19.8)
-
Step 500
500
#E34F5A
oklch(63.2% 0.183 19.9)
-
Step 600
600
#CE2840
oklch(55.6% 0.199 19.7)
-
Step 700
700 (this color)
#A9042B
oklch(46.6% 0.185 19.8)
-
Step 800
800
#90182A
oklch(42.6% 0.153 19.6)
-
Step 900
900
#741E26
oklch(37.8% 0.119 20)
-
Step 950
950
#441317
oklch(26.9% 0.075 19)
#A9042B 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) | #433E2B | 0.207 |
| Deuteranopia (no green cones) | #695E25 | 0.187 |
| Tritanopia (no blue cones) | #BA001A | 0.040 |
| Achromatopsia (no color) | #535353 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A9042B
#A9042B
oklch(46.6% 0.185 19.8)
- #00676B
#00676B
oklch(46.7% 0.079 199.5)
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 #A9042B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.018
- Carmine #9D0216 ΔE 0.033
- Cranberry #9E003A ΔE 0.034
- Auburn #9B2226 ΔE 0.034
- Brown #A52A2A ΔE 0.034
- Firebrick #B22222 ΔE 0.038
- Rufous #AE2012 ΔE 0.039
- Raspberry #B00149 ΔE 0.043
Use #A9042B 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.