#AD3B33
Closest named color: Rusty Red (#AF2F0D). oklch(51.4% 0.151 27.6), rgb(173, 59, 51).
Aa
White text reads best on this color (6.08:1).
About this color
#AD3B33 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.151 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.030 away. White text reads best on it, at 6.08:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.151) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #AD3B33 |
| RGB | rgb(173, 59, 51) |
| HSL | hsl(4, 54%, 44%) |
| OKLCH | oklch(51.4% 0.151 27.6) |
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 #AD3B33 | 6.08:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #AD3B33 | 3.45:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #AD3B33 text on white | 6.08:1 | AA | Lc 79.5 | Fine for body text |
| #AD3B33 text on black | 3.45:1 | AA large text | Lc -22.3 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F3D0CB
oklch(88.6% 0.04 27.5)
-
Step 300
300
#ECAFA7
oklch(80.8% 0.073 27.2)
-
Step 400
400
#E08378
oklch(70.7% 0.117 27.5)
-
Step 500
500
#D46055
oklch(63% 0.149 27.6)
-
Step 600
600
#C0433A
oklch(55.6% 0.162 27.7)
-
Step 700
700 (this color)
#AD3B33
oklch(51.4% 0.151 27.6)
-
Step 800
800
#862C26
oklch(42.7% 0.125 27.4)
-
Step 900
900
#6C2923
oklch(37.7% 0.097 27.7)
-
Step 950
950
#401915
oklch(27.1% 0.062 27.8)
#AD3B33 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) | #5A5331 | 0.160 |
| Deuteranopia (no green cones) | #776B30 | 0.145 |
| Tritanopia (no blue cones) | #BE1E3A | 0.049 |
| Achromatopsia (no color) | #626262 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD3B33
#AD3B33
oklch(51.4% 0.151 27.6)
- #007581
#007581
oklch(51.4% 0.088 207.3)
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 #AD3B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.030
- Dull Red #BB3F3F ΔE 0.033
- Brick #A03623 ΔE 0.033
- Firebrick #B22222 ΔE 0.034
- Brown #A52A2A ΔE 0.035
- Rufous #AE2012 ΔE 0.040
- Rust Red #AA2704 ΔE 0.041
- Russet #A13905 ΔE 0.043
Use #AD3B33 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.