#AD3604
Closest named color: Rusty Red (#AF2F0D). oklch(50.5% 0.163 38), rgb(173, 54, 4).
Aa
White text reads best on this color (6.35:1).
About this color
#AD3604 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.163 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.013 away. White text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #AD3604 |
| RGB | rgb(173, 54, 4) |
| HSL | hsl(18, 95%, 35%) |
| OKLCH | oklch(50.5% 0.163 38) |
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 #AD3604 | 6.35:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #AD3604 | 3.30:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #AD3604 text on white | 6.35:1 | AA | Lc 80.4 | Fine for body text |
| #AD3604 text on black | 3.30:1 | AA large text | Lc -21.4 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EEAF9C
oklch(80.8% 0.079 37.5)
-
Step 400
400
#E38365
oklch(70.7% 0.126 38.1)
-
Step 500
500
#D85F39
oklch(63.1% 0.161 37.8)
-
Step 600
600
#C3410E
oklch(55.5% 0.175 38.1)
-
Step 700
700 (this color)
#AD3604
oklch(50.5% 0.163 38)
-
Step 800
800
#892B06
oklch(42.8% 0.135 38.2)
-
Step 900
900
#6E2811
oklch(37.7% 0.105 37.9)
-
Step 950
950
#41190C
oklch(27.1% 0.066 38.3)
#AD3604 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) | #5A4E00 | 0.164 |
| Deuteranopia (no green cones) | #776900 | 0.148 |
| Tritanopia (no blue cones) | #BF062E | 0.067 |
| Achromatopsia (no color) | #5F5F5F | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD3604
#AD3604
oklch(50.5% 0.163 38)
- #007087
#007087
oklch(50.4% 0.091 218.6)
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 #AD3604, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.013
- Russet #A13905 ΔE 0.024
- Rust Red #AA2704 ΔE 0.025
- Brick #A03623 ΔE 0.031
- Rufous #AE2012 ΔE 0.034
- Burnt Umber #A0450E ΔE 0.034
- Sinopia #BB3E03 ΔE 0.034
- Firebrick #B22222 ΔE 0.038
Use #AD3604 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.