#AD3A18
Closest named color: Rusty Red (#AF2F0D). oklch(51% 0.157 36.2), rgb(173, 58, 24).
Aa
White text reads best on this color (6.18:1).
About this color
#AD3A18 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.157 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.017 away. White text reads best on it, at 6.18:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #AD3A18 |
| RGB | rgb(173, 58, 24) |
| HSL | hsl(14, 76%, 39%) |
| OKLCH | oklch(51% 0.157 36.2) |
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 #AD3A18 | 6.18:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #AD3A18 | 3.39:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #AD3A18 text on white | 6.18:1 | AA | Lc 79.8 | Fine for body text |
| #AD3A18 text on black | 3.39:1 | AA large text | Lc -22.0 | 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
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C6
oklch(88.4% 0.042 36.5)
-
Step 300
300
#EDB09F
oklch(80.9% 0.076 36.2)
-
Step 400
400
#E1846A
oklch(70.7% 0.121 36.5)
-
Step 500
500
#D66141
oklch(63.1% 0.155 36.2)
-
Step 600
600
#C1431E
oklch(55.5% 0.169 36.3)
-
Step 700
700 (this color)
#AD3A18
oklch(51% 0.157 36.2)
-
Step 800
800
#872C12
oklch(42.6% 0.13 36)
-
Step 900
900
#6D2917
oklch(37.7% 0.102 35.8)
-
Step 950
950
#40190E
oklch(27% 0.064 36.6)
#AD3A18 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) | #5C5112 | 0.159 |
| Deuteranopia (no green cones) | #786B11 | 0.146 |
| Tritanopia (no blue cones) | #BF1634 | 0.064 |
| Achromatopsia (no color) | #616161 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD3A18
#AD3A18
oklch(51% 0.157 36.2)
- #007287
#007287
oklch(50.9% 0.091 216.4)
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 #AD3A18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.017
- Russet #A13905 ΔE 0.027
- Brick #A03623 ΔE 0.031
- Rust Red #AA2704 ΔE 0.031
- Sinopia #BB3E03 ΔE 0.032
- Burnt Umber #A0450E ΔE 0.033
- Rufous #AE2012 ΔE 0.037
- Firebrick #B22222 ΔE 0.038
Use #AD3A18 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.