#AD2B23
Closest named color: Firebrick (#B22222). oklch(49.5% 0.168 28.4), rgb(173, 43, 35).
Aa
White text reads best on this color (6.67:1).
About this color
#AD2B23 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.168 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.013 away. White text reads best on it, at 6.67:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.168) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #AD2B23 |
| RGB | rgb(173, 43, 35) |
| HSL | hsl(3, 66%, 41%) |
| OKLCH | oklch(49.5% 0.168 28.4) |
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 #AD2B23 | 6.67:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #AD2B23 | 3.14:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #AD2B23 text on white | 6.67:1 | AA | Lc 81.6 | Fine for body text |
| #AD2B23 text on black | 3.14:1 | AA large text | Lc -20.3 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E4E1
oklch(93.5% 0.023 27.3)
-
Step 200
200
#F6CFC9
oklch(88.6% 0.045 28.3)
-
Step 300
300
#F1ADA3
oklch(80.9% 0.082 28.4)
-
Step 400
400
#E67F72
oklch(70.7% 0.129 28.3)
-
Step 500
500
#DC594C
oklch(63.1% 0.167 28.4)
-
Step 600
600
#C7392F
oklch(55.6% 0.181 28.4)
-
Step 700
700 (this color)
#AD2B23
oklch(49.5% 0.168 28.4)
-
Step 800
800
#8B251E
oklch(42.7% 0.138 28.4)
-
Step 900
900
#70251E
oklch(37.8% 0.108 28.5)
-
Step 950
950
#421712
oklch(27.1% 0.068 29)
#AD2B23 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) | #534A21 | 0.179 |
| Deuteranopia (no green cones) | #73661D | 0.163 |
| Tritanopia (no blue cones) | #BF002B | 0.045 |
| Achromatopsia (no color) | #5C5C5C | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD2B23
#AD2B23
oklch(49.5% 0.168 28.4)
- #006F7B
#006F7B
oklch(49.5% 0.085 207.8)
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 #AD2B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.013
- Rufous #AE2012 ΔE 0.015
- Brown #A52A2A ΔE 0.019
- Rusty Red #AF2F0D ΔE 0.019
- Rust Red #AA2704 ΔE 0.020
- Brick #A03623 ΔE 0.028
- Burnt Red #9F2305 ΔE 0.038
- Scarlet #BE0119 ΔE 0.039
Use #AD2B23 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.