#AD1F09
Closest named color: Rufous (#AE2012). oklch(48.3% 0.179 31.4), rgb(173, 31, 9).
Aa
White text reads best on this color (7.05:1).
About this color
#AD1F09 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.179 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.005 away. White text reads best on it, at 7.05:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #AD1F09 |
| RGB | rgb(173, 31, 9) |
| HSL | hsl(8, 90%, 36%) |
| OKLCH | oklch(48.3% 0.179 31.4) |
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 #AD1F09 | 7.05:1 | AAA | Lc -87.7 | Fine for body text |
| Black text on #AD1F09 | 2.97:1 | Fails | Lc 21.3 | Dividers and decoration only |
| #AD1F09 text on white | 7.05:1 | AAA | Lc 82.7 | Fine for body text |
| #AD1F09 text on black | 2.97:1 | Fails | Lc -19.2 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC6
oklch(88.4% 0.048 30.9)
-
Step 300
300
#F3AC9E
oklch(80.8% 0.087 31.5)
-
Step 400
400
#EA7D69
oklch(70.8% 0.139 31.6)
-
Step 500
500
#E0553F
oklch(63% 0.178 31.4)
-
Step 600
600
#CC321C
oklch(55.6% 0.194 31.3)
-
Step 700
700 (this color)
#AD1F09
oklch(48.3% 0.179 31.4)
-
Step 800
800
#8F2010
oklch(42.8% 0.149 31.4)
-
Step 900
900
#732216
oklch(37.8% 0.116 31.3)
-
Step 950
950
#44150E
oklch(27% 0.074 30.9)
#AD1F09 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) | #4F4502 | 0.192 |
| Deuteranopia (no green cones) | #716400 | 0.173 |
| Tritanopia (no blue cones) | #BF001D | 0.041 |
| Achromatopsia (no color) | #595959 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD1F09
#AD1F09
oklch(48.3% 0.179 31.4)
- #006B7A
#006B7A
oklch(48.4% 0.084 211.5)
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 #AD1F09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.005
- Rust Red #AA2704 ΔE 0.011
- Firebrick #B22222 ΔE 0.020
- Rusty Red #AF2F0D ΔE 0.022
- Brown #A52A2A ΔE 0.026
- Burnt Red #9F2305 ΔE 0.029
- Brick #A03623 ΔE 0.035
- Scarlet #BE0119 ΔE 0.038
Use #AD1F09 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.