#AD2A00
Closest named color: Rust Red (#AA2704). oklch(49.2% 0.173 35), rgb(173, 42, 0).
Aa
White text reads best on this color (6.75:1).
About this color
#AD2A00 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.173 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Red (#AA2704), ΔE 0.009 away. White text reads best on it, at 6.75:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #AD2A00 |
| RGB | rgb(173, 42, 0) |
| HSL | hsl(15, 100%, 34%) |
| OKLCH | oklch(49.2% 0.173 35) |
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 #AD2A00 | 6.75:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #AD2A00 | 3.10:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #AD2A00 text on white | 6.75:1 | AA | Lc 81.8 | Fine for body text |
| #AD2A00 text on black | 3.10:1 | AA large text | Lc -20.1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC5
oklch(88.5% 0.046 34.7)
-
Step 300
300
#F1AE9C
oklch(80.9% 0.083 35.6)
-
Step 400
400
#E77F66
oklch(70.6% 0.134 34.5)
-
Step 500
500
#DD5A3A
oklch(63.1% 0.171 34.9)
-
Step 600
600
#C83911
oklch(55.5% 0.186 34.9)
-
Step 700
700 (this color)
#AD2A00
oklch(49.2% 0.173 35)
-
Step 800
800
#8C2508
oklch(42.7% 0.143 35)
-
Step 900
900
#712512
oklch(37.8% 0.112 35)
-
Step 950
950
#42170C
oklch(27% 0.07 35.4)
#AD2A00 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) | #544900 | 0.179 |
| Deuteranopia (no green cones) | #746600 | 0.161 |
| Tritanopia (no blue cones) | #BF0024 | 0.052 |
| Achromatopsia (no color) | #5B5B5B | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD2A00
#AD2A00
oklch(49.2% 0.173 35)
- #006D80
#006D80
oklch(49.2% 0.087 215.3)
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 #AD2A00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.009
- Rusty Red #AF2F0D ΔE 0.010
- Rufous #AE2012 ΔE 0.017
- Firebrick #B22222 ΔE 0.026
- Russet #A13905 ΔE 0.030
- Brick #A03623 ΔE 0.030
- Brown #A52A2A ΔE 0.032
- Burnt Red #9F2305 ΔE 0.033
Use #AD2A00 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.