#AD431C
Closest named color: Sinopia (#BB3E03). oklch(52.2% 0.148 39), rgb(173, 67, 28).
Aa
White text reads best on this color (5.83:1).
About this color
#AD431C is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.148 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.027 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #AD431C |
| RGB | rgb(173, 67, 28) |
| HSL | hsl(16, 72%, 39%) |
| OKLCH | oklch(52.2% 0.148 39) |
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 #AD431C | 5.83:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #AD431C | 3.59:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #AD431C text on white | 5.83:1 | AA | Lc 78.4 | Fine for body text |
| #AD431C text on black | 3.59:1 | AA large text | Lc -23.4 | 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
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F2D1C6
oklch(88.5% 0.04 39.3)
-
Step 300
300
#EAB19F
oklch(80.8% 0.072 38.2)
-
Step 400
400
#DD876A
oklch(70.7% 0.114 39.4)
-
Step 500
500
#D16541
oklch(63% 0.146 38.8)
-
Step 600
600
#BD491E
oklch(55.6% 0.159 39)
-
Step 700
700 (this color)
#AD431C
oklch(52.2% 0.148 39)
-
Step 800
800
#843011
oklch(42.6% 0.123 38.9)
-
Step 900
900
#6A2C16
oklch(37.6% 0.095 39.4)
-
Step 950
950
#3F1A0E
oklch(27% 0.062 38.5)
#AD431C 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) | #615616 | 0.147 |
| Deuteranopia (no green cones) | #7B6E17 | 0.134 |
| Tritanopia (no blue cones) | #BF283B | 0.066 |
| Achromatopsia (no color) | #656565 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD431C
#AD431C
oklch(52.2% 0.148 39)
- #00768E
#00768E
oklch(52.3% 0.094 218.5)
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 #AD431C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.027
- Burnt Umber #A0450E ΔE 0.028
- Cinnamon #AC4F06 ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.033
- Russet #A13905 ΔE 0.035
- Sienna #A0522D ΔE 0.035
- Brick #A03623 ΔE 0.042
- Burnt Siena #B75203 ΔE 0.044
Use #AD431C 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.