#AD1B3B
Closest named color: Rouge (#AB1239). oklch(48.6% 0.178 16.1), rgb(173, 27, 59).
Aa
White text reads best on this color (7.00:1).
About this color
#AD1B3B is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.178 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.010 away. White text reads best on it, at 7.00:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #AD1B3B |
| RGB | rgb(173, 27, 59) |
| HSL | hsl(347, 73%, 39%) |
| OKLCH | oklch(48.6% 0.178 16.1) |
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 #AD1B3B | 7.00:1 | AAA | Lc -87.6 | Fine for body text |
| Black text on #AD1B3B | 2.99:1 | Fails | Lc 21.5 | Dividers and decoration only |
| #AD1B3B text on white | 7.00:1 | AAA | Lc 82.5 | Fine for body text |
| #AD1B3B text on black | 2.99:1 | Fails | Lc -19.4 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F7CDCE
oklch(88.5% 0.048 16.5)
-
Step 300
300
#F3AAAE
oklch(80.9% 0.086 15.5)
-
Step 400
400
#E97A83
oklch(70.7% 0.137 16.1)
-
Step 500
500
#DF5164
oklch(63% 0.177 15.9)
-
Step 600
600
#CA2D4B
oklch(55.5% 0.192 16)
-
Step 700
700 (this color)
#AD1B3B
oklch(48.6% 0.178 16.1)
-
Step 800
800
#8E1C32
oklch(42.7% 0.148 16)
-
Step 900
900
#72202C
oklch(37.8% 0.114 16.2)
-
Step 950
950
#43141A
oklch(27% 0.073 15.8)
#AD1B3B 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) | #49463B | 0.199 |
| Deuteranopia (no green cones) | #6D6437 | 0.182 |
| Tritanopia (no blue cones) | #BE002A | 0.037 |
| Achromatopsia (no color) | #595959 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD1B3B
#AD1B3B
oklch(48.6% 0.178 16.1)
- #006E6F
#006E6F
oklch(48.8% 0.083 195.9)
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 #AD1B3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.010
- Raspberry #B00149 ΔE 0.030
- Brown #A52A2A ΔE 0.034
- Rose Red #BE013C ΔE 0.034
- Firebrick #B22222 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.039
- Cranberry #9E003A ΔE 0.043
- Rufous #AE2012 ΔE 0.044
Use #AD1B3B 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.